My task is to attempt to give a bird’s-eye view of
“The Methods of Controlling Tuberculosis in England,”
and to revaluate, as far as is practicable, in the
light of many years’ study of the disease, the relative
value of the measures which historically have been
followed by the greatly reduced mortality from tuberculosis.
The subject teems with difficulties, and as
you are aware there is no unanimity of opinion when
tuberculosis is thus considered. This is the more surprising
in view of our present accurate knowledge of
the pathology of disease caused by bovine and human
tubercle bacilli, and in view of the fairly general unanimity
of opinion as to the methods of control which
are needed to secure still more rapid reduction of the
devastations of tuberculosis. This general opinion
may, I think, be summarised in the statement which I
have made elsewhere, that the removal or diminution
of infection from each single case of tuberculosis
reduces correspondingly the prospect of further cases,
but that tuberculosis will not be completely controlled
until every tuberculous patient receives such care
throughout the whole course of his life, as will ensure
his welfare and will obviate the likelihood of his infecting
others.
It is noteworthy that the English death-rate from
pulmonary tuberculosis—which is responsible for 71
per cent. of the total mortality from tuberculosis, and
which is practically always due to infection from a
human source,—declined in males between 1871-75
and 1876-80 by 7.2 per cent.; in the next quinquennium
by 9.8 per cent.; between 1881-85 and 1886-90
by 8.3 per cent.; in the next quinquennium by 9.5 per
cent.; between 1896-1900 and 1901-05 by 7 per cent.;
and between 1901-06 and 1906-10 by 9.7 per cent.
Evidently a large share of the reduction of the death-rate
from phthisis occurred before it was generally regarded
as an infectious disease, and before sanatoria
were in existence for its treatment. It should be
added that since the possibilities of infection have been
realised and the need for treatment of the disease has
been appreciated, there has in no part of the world,
so far as I am aware, been an adequate application of
known methods of prevention and treatment.
We must look elsewhere, therefore, than to intentional
measures directed against tuberculosis for an
explanation of its decline during the period before
Koch discovered the tubercle bacilli and before the
significance of this discovery was appreciated; and
attempt to appreciate the relative value of the factors
of decline operating before and since our outlook on
the disease was fundamentally changed.
Certain facts stand out beyond controversy, and
on these administrative control must necessarily be
based.
1. Tuberculosis is a chronic infectious disease with
a low degree of infectivity. Circumstances favouring
infection have a high degree of importance; but tuberculosis
does not develop in the absence of the tubercle
bacillus. No infection, no disease.
2. Tuberculosis may remain latent in the system for
many years, and there is strong reason for thinking
that the infection of a large proportion of early adult
tuberculosis was acquired in childhood.
3. The two types of tubercle bacilli, bovine and human,
are stable both in character and in degree of
virulence, and are not interchangeable so far as can
be shown by protracted experimentation. The human
type of bacillus is the chief source of infection of
mankind, though bovine infection is not negligible.
Out of 98 children between the age of 2 and 10 years
who had died in various hospitals from all causes unselected,
18 or 18.4 per cent. were found to have been
infected by tubercle bacilli of the bovine type, and 81
or 81.6 per cent. by tubercle bacilli of the human type.
(Report on Investigations made in the Laboratory of
the Local Government Board, Annual Report of the
Medical Officer of the Local Government Board,
1913-14, p. lix.)
4. Animal experimentation shows that in animals of
the same species the extent of tuberculosis produced
depends to a large and probably to a dominant extent
on the number of tubercle bacilli introduced into the
system. Although doubtless there are variations in
susceptibility in families, and in each individual at different
periods, there is little doubt that in the main
the same rule holds good for mankind.
5. Experience shows that dusty occupations, indoor
occupations, alcoholism, over-fatigue, an attack of
acute illness, especially of influenza, measles, or enteric
fever, increase the danger of minimal doses of tubercle
bacilli, and serve to bring latent foci of disease into
activity.
In the light of the above facts, how is the steady
and continuous decline in the death-rate from tuberculosis
during the last fifty years to be explained?
(a) No support is given by animal experiment to
the assumption that the types of human bacillus infecting
mankind have declined in virulence; and changes
in the severity of consumption historically or currently
in different races of mankind are equally explicable on
the ground of differences in social misery, in sanitary
conditions and associated heavier dosage of infection
and neglect of treatment.
(b) The facts do not appear to me to be reconcilable
with the assumption that natural selection has
increased human resistance to infection by tuberculosis;
though, were this so, it would not justify refraining
from every possible effort to control infection and
to treat every tuberculous patient by the best known
methods. Tuberculosis is an ancient disease, there
being evidence of it in Egyptian mummies 1000 years
B.C.; and any selective agency has, therefore, had
ages for its operation. If the steady decline—approximating
2 per cent. per annum in the death-rate from
pulmonary tuberculosis in England during the last
thirty or forty years—has resulted from the acquirement
of racial immunity, it is remarkable that a somewhat
similar decline has occurred almost simultaneously
during the last forty years in Great Britain,
Germany, and America; while in France, Norway,
and Ireland there has been little if any decline, or it
has occurred only in very recent years.
To assume that susceptibility to the tubercle bacillus
in the course of its natural history has diminished in
England, and that Ireland has not shared in this privilege
would be to add one more to Irish grievances!
This assumption does not fit in with international facts;
which point rather to the conclusion that, during the
period in question, unsatisfactory sanitary and social
circumstances, including opportunities for massive and
protracted infection, have continued to a greater extent
and for a longer time in Ireland and France than in
Great Britain, America and Germany.
(c) If the assumption of increasing racial immunity
does not consist well with all the facts, more perhaps
can be said in favour of the unproved hypothesis that
a high proportion of the population are from time to
time temporarily immunized by small doses of tubercle
bacilli; and their resistance to larger doses of infection
thereby increased. Experimentally calves inoculated
with small doses of tubercle bacilli remain during the
next year or two unaffected by much larger doses of
tubercle bacilli, unlike calves not submitted to this
treatment. Tubercle bacilli are somewhat widely distributed,
though they occur chiefly in the immediate
environment of careless consumptive patients; and it
is conceivable that minimal doses of bacilli may arouse
the resistance of the cells and fluids of the body and
prepare them to resist successfully larger doses of
infection. This is consistent with the fact that while
one in about ten deaths from all causes is caused by
tuberculosis, a majority of the total population are
shown by pathological evidence to have been at one
time or another infected by tuberculosis, and yet have
either never been ill, or have recovered, usually without
the existence of tuberculosis being detected or
even suspected. Obviously this is satisfactory evidence
that mankind is relatively resistant to the infection
of tuberculosis.
The fact just mentioned naturally leads to the question:
what determines the result when tubercle bacilli
invade the human subject? Assuming fairly uniform
virulence of tubercle bacilli, the result for an infected
person depends on two factors: the dosage of infection,
and the resistance of the cells and fluids of the
invaded person; and evidently increase in the dosage
of infection and lowering of personal resistance may
have identical effect in determining serious disease.
Of the importance of the already mentioned factors
which lower personal resistance to disease,—often also
at the same time increasing infection,—there can be
no doubt.
It is impossible in most instances to set out separately
circumstances increasing infection from circumstances
lowering resistance. During the last three or
four decades there has been improvement in respect
of the factors lowering resistance to attack, but there
has been simultaneously a great decline in opportunities
for infection on a massive scale, as a result of
habits of greater cleanliness, especially in regard to
spitting, of diminished overcrowding of population,
and of increased treatment and the incidental segregation
of advanced cases of disease in hospital beds.
I have seen no reason for revoking the conclusion
expressed in 1908 in a lecture to the Washington International
Congress on Tuberculosis that historically the
hospital treatment and coincident segregation of patients
suffering from pulmonary tuberculosis has been
an important and probably a dominant factor in producing
the national decline in the death-rate from tuberculosis
in the countries in which a decline has been
experienced. This explanation fits in with our knowledge
of the disease, and with the analogous history of
leprosy; and it is supported by the fact that by complete
segregation of infected from non-infected cattle
tuberculosis can be eliminated at will from a herd of
cattle. It is remarkable, as I have elsewhere set out
in much detail, that improved general health, increased
well-being, and sanitary education have operated in
Great Britain, Germany, Belgium, Denmark, and Massachusetts
side by side with great decrease in the death-rate
from pulmonary tuberculosis; while up to very
recent years the same influences in France, Norway,
and Ireland have produced little or no decrease in the
national death-rate from tuberculosis. And similarly
no constant relation can be shown between the degree
of sanitary and social well-being in different countries
and cities, and the amount of mortality imposed by
tuberculosis. How is it that in some countries a high
degree of domestic overcrowding is associated with a
low and declining phthisis death-rate and conversely
that a persistently high phthisis death-rate may occur
with a less but still diminishing degree of overcrowding?
The explanation is contained, I maintain, in the
following statement:
A given amount of domestic overcrowding with a
large amount of institutional segregation of consumptives
is associated with less tuberculosis than when
overcrowding is less but accompanied by only a small
amount of institutional segregation of consumptives.
The data as to institutional segregation are difficult
to obtain; but there is sufficient evidence to show that
in countries which have experienced a large reduction
in the death-rate from tuberculosis a large proportion
of hospital treatment for many years has been provided
for consumptives, while in countries which have
not experienced this decline such provision has been
absent or imperfect. In London about 56 per cent.,
in county boroughs 35 per cent., in other urban districts
21 per cent., and even in rural districts of England
near 16 per cent. of all deaths from pulmonary
tuberculosis occur in hospitals (poor-law institutions,
general and special hospitals, and asylums). Prior to
the patient’s death he has had on an average at least
three months, and probably in the aggregate more
nearly five or six months, residential treatment, and
this at the stages of disease in which there is the greatest
discharge of infective material, in which owing to
feebleness the patient is least able to control its hygienic
disposal, and in which—had the patient been
treated at home—the relatives would be especially
liable to receive massive infection, and would be enfeebled
by overwork and anxiety, or by the malnutrition
associated with poverty.
Some writers have failed to visualize the fact that
the segregation of a minority of the total cases of pulmonary
tuberculosis for a portion of their illness can
have had a marked influence on the prevalence of this
disease. They appear to be judging tuberculosis by
the same measure as they would apply to smallpox,
which in an unprotected community spreads rapidly if
a few cases are overlooked. The case of tuberculosis,
like that of leprosy, is governed by the considerations
that both these diseases as a rule require intimate and
protracted contact for their spread, and that in both
diseases there may be prolonged latency before active
disease develops. A hypothetical illustration may serve
to elucidate the order of magnitude of the influence
exercised by institutional segregation. Let us assume—as
is probably the case in England—that one-fifth of
the cases of pulmonary tuberculosis are treated during
one-third of a year institutionally under conditions in
which they will not be liable to spread infection. Let
us assume further that each of these cases has an infectious
lifetime of three years. Thus one-fifth of the
cases are deprived of their power to spread infection
during one-ninth of their period of “open” disease.
It being assumed that personal infection causes pulmonary
tuberculosis and that segregation is efficient,
segregation to the extent indicated above should secure
a reduction in the death-rate from pulmonary
tuberculosis of 100/(5 × 9) approximately 2 per cent.
In actual fact the decline in the English death-rate
from pulmonary tuberculosis since 1871 has been at a
rate slightly under 2 per cent. per annum.
An extract from an article written by Robert Koch
shortly before his death may be permitted (Epidemiologie
der Tuberkulose Zeitschr. für Hyg. und Infektious
Krankheiten. 4. XVII, 1910).
I am entirely in agreement with Newsholme that the allocation
of consumptives to institutions for the sick, as freely
as possible and for as long as possible, is the most active
means of avoiding infection and the consequent spread of
phthisis.
In my experience, too, phthisis has shown the most marked
decline in those places where comprehensive measures have
been taken for bringing consumptives into hospitals, and the
converse has been the case where the converse conditions
prevail. It is indeed obvious that in no other way can the
danger of infection, which a phthisical patient constitutes, be
so effectively removed as by isolation in hospital. Strong
support of this method is afforded by leprosy, where good
results in attacking the disease have been obtained by following
the same principle.
In addition to this factor there is a second, which also
plays a very important part, viz., housing.
A hypothesis explanatory of a given phenomenon
should be consistent with all the associated facts. We
have seen that the hypothesis that segregation of consumptives
is an important factor in the reduction of
the death-rate from pulmonary tuberculosis agrees (1)
with our knowledge of the tubercle bacillus, and (2)
with veterinary and agricultural experience; also (3)
that,—although exact data are unobtainable,—the degree
of segregation when ascertainable is consistent
with the degree of decline in the death-rate; (4) it is
important to note also that this hypothesis is consistent
with the otherwise anomalous facts that although the
proportion of the population subjected to urban conditions
of life has steadily increased, and the number of
persons per inhabited room remains much greater in
towns than in country districts, the death-rate from
pulmonary tuberculosis in England has declined as
much in them as in country districts; and that notwithstanding
the greater overcrowding in towns, the urban
is rapidly falling to the level of the rural death-rate
from this disease. The town dweller’s better and
more frequent treatment in hospitals is an important
factor in overcoming the handicap of urban conditions
of life, including overcrowding and preponderance of
indoor and dusty occupations.
It is desirable to supplement the above statement by
some remarks on
Not infrequently the thoughtless remark is made
that given improved housing sanatoria and hospitals
for consumptives would be unnecessary. The frequent
occurrence of tuberculosis in well-to-do families
shows the absurdity of this statement. It is true that
tuberculosis is more prevalent among the poor living
in small tenements that among the well-to-do; but
there is no consistent proportion between the degree
of overcrowding in different districts or towns and
the death-rate from tuberculosis. Improved housing
and institutional treatment for tuberculosis cannot
properly be regarded as alternatives. They are necessary
complements to each other, and there must be
increased expenditure in both directions, if tuberculosis
is to be more rapidly reduced in amount. There
are in fact two housing problems—for the healthy,
and for the sick. The most rapid method of improving
housing for the healthy is to remove the sick, and
especially the tuberculous sick to a hospital. This is
being done year by year to an increasing extent. In
England and Wales in 1870, 8.3 per cent., and in 1912
21.6 per cent. of all deaths from all causes occurred in
public institutions. It is difficult to exaggerate the
practical relief implied in these figures in respect of
satisfactory housing, especially in its functional aspect.
Apart altogether from the tuberculosis problem much
of the decline in the general death-rate must be attributed
to the skilled treatment which a large proportion
of the total population have received in our hospitals
of various types.
I may, I think, claim to have answered in part the
question asked at an earlier stage of this address, as
to the causes of the steady decline in the death-rate
from tuberculosis in recent decades. I do not claim
that any one factor has brought about this result. I
do not claim that it has been caused entirely by diminution
of opportunities of infection; but I deprecate
the view that improved nutrition and other conditions
diminishing susceptibility have played a predominant
part. The facts of international hygienic history rebut
this view. Although segregation of patients in
institutions has played a great part in bringing about
the result, diminution of domestic infection as the
result of more cleanly habits has doubtless had an important
influence; as has also the reduction of industrial
dust.
It is significant that general hygiene and improved
care of the sick—quite apart from any intention to
segregate—were associated with a large reduction in
the death-rate from tuberculosis before the importance
of reducing infection was fully appreciated; and that
since the necessity for direct measures against tuberculosis
was realised, since such measures have been
begun, however imperfectly, in many countries, and
since anti-tuberculosis educational propaganda has
been somewhat active, there has been no increase
in the rapidity of decline of the death-toll of tuberculosis.
Of course, it cannot be seriously—though
it is foolishly—argued from this fact that such direct
measures are futile. Every year there has been increasing
migration of masses of people into towns,
with a corresponding increase of undesirable domestic
overcrowding and of indoor occupations. If, therefore,
such anti-tuberculosis measures as have been
adopted,—whether direct measures or general sanitary
measures,—had been associated with an absence of
decline or with actual increase in the death-rate from
tuberculosis it might still be that these measures have
achieved much. Many conflicting agencies are at
work, and it might well be that the apparent lack of
success of the measures taken is due to the increased
operation of countervailing influences. The importance
of direct action for the control of tuberculosis
must be judged not solely by necessarily imperfect
statistical measurement on the basis of a few years’
observation, but by ascertaining that the proposed
measures are in accord with our knowledge of the natural
history of the disease. As we have seen, both
comparative and human pathology assure us that tuberculosis
is a communicable and therefore a preventible
disease, and point the way to the means for securing
this end.
Before describing the direct measures which have
been adopted for the control of tuberculosis, it should
be added that in no country have these been in operation
sufficiently long, and in no country have they been
so adequately applied, as to render it practicable to
apply statistical measurement of their value; meanwhile
these measures must be judged in the light of
our knowledge of the pathology of tuberculosis.
If every tuberculous patient were intelligent, and
willing and able to follow the advice given by his doctor,
if he consulted his doctor for the first symptoms
of illness, if his disease were recognized by the doctor
at its earliest recognizable stage, and if the doctor in
every instance gave the right advice and made the necessary
examinations of all “contacts,” no occasion
would arise for the intervention or assistance of Public
Health Authorities, except in providing bacteriological
facilities and institutional accommodation. In
actual fact these conditions are not secured for the
majority of patients; and the private practitioner,
however willing, is seldom in a position to remedy the
domestic and industrial insanitary conditions which
favour infection and lower resistance to infection.
Hence notification of cases of tuberculosis was advocated
for many years by pioneer medical officers
of health who secured voluntary notification by doctors
of a considerable proportion of the total cases in
their districts, and in a few instances secured compulsory
notification by local enactment, before any general
regulations on the subject were made. It is noteworthy
that in this early period a town like Brighton,
which had voluntary notification with sanatorium provision
for patients willing thus to be treated, secured
the notification of a larger proportion of total cases
than another town in which notification was compulsory,
but no sanatorium accommodation had been provided.
The point is mentioned as emphasizing the
general principle that compulsory measures in public
health, if they are to be successful, require to be associated
with full provision for the action which should
follow the compulsory enactment; which provision, as
in this case, may be a direct inducement to compliance
with the enactment. In view of the change of central
policy involved and of the unpreparedness of most
local authorities to give the assistance needed for notified
cases, the general enforcement of notification of
tuberculosis was brought about in stages; in 1909
poor-law cases of consumption were made notifiable
throughout England and Wales, hospital cases in 1911,
consumption in the general community in 1912, and all
forms of tuberculosis in 1913.
It was not anticipated that complete notification of
cases would be obtained for some years, but a review of
English national experience of notification of tuberculosis
up to the present time necessitates the confession
that there has been failure to secure the coöperation
of an unexpectedly large proportion of the medical
profession in this public-health duty. Many cases
have never been notified and in a large number of
other cases notification has been belated; Dr. Barwise,
County Medical Officer of Health of Derbyshire, obtained
information as to 417 deaths certified during
1917 to be due to tuberculosis, and found that of this
number 39 per cent. had never been notified, and that
over 70 per cent. had either not been notified or died
within twelve weeks of notification. This may be an
exceptionally bad experience; but the duty of notification
in many areas is only imperfectly performed, and
no adequate steps are being taken to diminish this
default.
As notification is the first step towards coördinated
measures for the patient and in the interest of the
public health, the causes of delay in notification and
of failure to notify deserve further examination.
1. The patient himself commonly is responsible for
much delay in the recognition of his disease. A large
proportion of consumptive patients refrain from applying
for treatment until disease is fully established,
and until they are incapacitated for work. Not infrequently
this means that the patient does not consult a
doctor until a few months or even weeks before his
death. Until the conditions of general medical practice
are altered, and every person has the right to state-paid
medical consultations, belated recourse to medical
advice will continue.
With this there is badly needed further education of
the public as to seeking advice for protracted colds and
coughs, or for other symptoms suggestive of tuberculosis;
and a wider hygienic propaganda as to housing,
overcrowding, dusty indoor occupations, expectoration,
etc., is also called for.
2. Under present conditions of medical practice,
early diagnosis of tuberculosis often fails to be secured,
even when the patient places himself under
medical care. It is to the private practitioner that
most patients resort, and the early recognition and
treatment of disease depends primarily (a) on his skill,
(b) on his not being so overworked as to be unable to
devote adequate time to the examination of each patient
coming under his care, and (c) on his willingness
to refer doubtful cases for consultation with the official
tuberculosis officer of each area. These officials
have only existed during the last few years; their
work was partially in abeyance during the four and a
half years of war; and apart from this, they have not
always succeeded in persuading the private practitioner
that their coöperation is to be welcomed and
that they are not agents for depriving him of his private
patients. This assumed antagonism between private
and public medical practice is one of the most
serious difficulties in securing more rapid progress in
anti-tuberculosis work.
3. For nearly every sanitary area gratuitous facilities
are now provided for the examination of sputum
for tubercle bacilli, and yet in many areas there is
grave neglect to utilize this provision, and patients
with chronic phthisis may be treated during long
months or even years for “winter cough,” “bronchitis,”
etc., without adequate physical examination of
sputum. The diagnosis of pulmonary tuberculosis
ought, it is true, to be made before tubercle bacilli are
found in the sputum, and failure to recognize the disease
prior to this implies that the disease has already
become serious; but in fact a very large proportion of
consumptive patients for many months have tubercle
bacilli in their sputum, before the diagnosis of tuberculosis
is made.
4. When, as in some areas, the medical officer of
health or the tuberculosis officer takes little, if any,
useful action after notifications have been received, the
practitioner has an excuse for not notifying subsequent
cases. He can argue with some cogency that
notification has no value per se; its utility depends on
the action which follows on notification. Unless useful
action follows on notification, default in notification
has little practical importance.
Under the English Tuberculosis Regulations the
medical officer of health or an officer of the local authority
acting under his instructions is required to
make such inquiries and take such steps as may be
necessary or desirable for investigating the source of
infection, for preventing the spread of infection, and
for removing conditions favourable to infection. The
action required includes inter alia
1. Attention to the personal hygiene of the patient,
including instruction in the necessary precautions as
to coughing and expectoration.
2. Any assistance needed to ensure for the patient
(a) Skilled medical attendance and nursing as required
while he is treated at home;
(b) Institutional treatment when required;
(c) Supplementation of the convalescent patient’s
funds, when needed, to obviate the necessity for him
at once to embark in full-time work; to provide additional
bedroom accommodation when needed; and to
ensure that the patient and his family are not undernourished
or overworked.
3. Remedial action for any insanitary conditions of
the home, such as uncleanliness, dampness, overcrowding;
or of the patient’s workplace, especially for dusty
occupations.
4. Examination of home contacts with the patient.
The last named item may conveniently be considered
further at this point.
This branch of tuberculosis work is most important.
Often the first notified case is not the first clinical case
of tuberculosis in a given family; and from the standpoint
of prevention the detection of such cases of
longer standing is important. Examination of contacts
also frequently discovers patients in an earlier
and more curable stage of disease than the notified
patient.
It is important that all home contacts of each notified
case of tuberculosis should be examined; and one
of the most important functions of the tuberculosis
officer is to arrange for this. The examination may
be carried out by arrangement at the tuberculosis dispensary;
but otherwise, at the home of the invaded
family. When there is a medical practitioner in attendance
his coöperation and presence should as a rule
be invited.
Such systematic examination of the household not
only is more efficient in discovering sources of continuing
infection than the desultory examination of a
few contacts,—which often still represents the extent
of this important work,—but it has in addition a
greater educational effect on the public; and general
recourse to such systematic observations would rapidly
improve the prospect of satisfactory control of
tuberculosis.
Even when examination of contacts is practised
after notification of a case of pulmonary tuberculosis,
it is too often neglected after notification of non-pulmonary
cases. This represents a great public-health
loss; the majority of cases of non-pulmonary
tuberculosis are caused by infection of human source,
and this source often is an unrecognized case of pulmonary
tuberculosis in the patient’s family.
Prior to the general enforcement of notification of
tuberculosis in England excellent local work had been
done in a relatively small number of areas in direct
efforts to control the spread of tuberculosis, in addition
to the previous general measures, such as improved
sanitation, better housing, more satisfactory
nutrition, and especially the hospital treatment of a
large proportion of advanced and acute cases of tuberculosis.
The Report of the last Royal Commission on
Tuberculosis appeared in 1911; and although precautions
against human infection by tuberculous cows’
milk are still very incomplete, the pasteurisation or
boiling of milk is more generally practised than in
the past.
Local Authorities prior to 1911 had power to build
sanatoria or otherwise provide institutional accommodations
for the treatment of tuberculous patients;
relatively little had been done in most areas. In 1911
the Finance Act provided a sum of £1,116,000 for the
erection of sanatoria in England and Wales, and this,
with money provided by local rates, has led to rapid
increase in accommodation for the residential institutional
treatment of tuberculosis. In England in 1911
local authorities, other than poor-law authorities, had
about 1300 beds for the institutional treatment of tuberculosis,
while there were 4,200 beds in private sanatoria
and voluntary institutions. In 1917 the total
available beds numbered 12,441, of which about one-half
had been provided by local authorities.
In 1911 the National Insurance Act was passed and
came into operation in July, 1912. This provided a
special “Sanatorium Benefit.”
The Departmental Committee appointed to make
recommendations as to detailed direct measures against
tuberculosis, reported in April, 1912, that any scheme
which is to form the basis of an attempt to deal with
the problem of tuberculosis should be available for the
whole community, and that its organization should be
undertaken by the large local authorities (the councils
of counties and county boroughs). These recommendations
were at once adopted by the Government,
which undertook to provide out of the national exchequer
one-half of the net cost of approved local
schemes for the general treatment of tuberculosis.
Local authorities were invited at once to prepare
schemes for institutional treatment, residential and
non-residential, domiciliary treatment remaining in the
hands of private practitioners, of poor-law doctors,
and of doctors engaged in the contract work under the
National Insurance Act (“panel doctors”). The
last named are in medical charge of the large mass of
the wage-earners of the community, comprising roughly
one-third of the total population, in so far as their
treatment at home is within the power of a practitioner
of average competence. The schemes proposed
for each area comprised,
1. The appointment of a tuberculosis officer, usually
a whole-time official, who was required to have had
special experience in the diagnosis and treatment of
tuberculosis, and who as a rule was an officer in the
public-health department under the administrative supervision
of the medical officer of health, but independent
in his clinical work;
2. The establishment of tuberculosis dispensaries, at
which patients were treated, consultations as to doubtful
cases held, and contacts examined;
3. The provision of beds in residential institutions
for curable and for acute and advanced cases;
4. The organization of arrangements for “following
up” and “after-care.”
During 1912 and 1913 advance was made in these
directions. In 1911 there were 25-30 tuberculosis
dispensaries: in 1917 their number had increased to
371. In 1914 the onset of the Great War prevented
further development of tuberculosis work and seriously
crippled and reduced the efficiency of work
already initiated; and this increased as the military
demand for medical officers and institutions became
greater. It may be stated generally that in only a
relatively small number of areas have fairly complete
arrangements for the institutional treatment of tuberculosis
come into operation; and that even in these
areas the arrangements have been at work for only a
limited period. It is evident, therefore, as already
pointed out, that no argument as to the utility of these
arrangements can be based on the facts that the death-rate
from tuberculosis has not declined with increased
rapidity in recent years, and that women during the
war, especially at the working years of life have experienced
an increased death-rate from this disease.
The tuberculosis officer is the essential element in
the dispensary; and in rural districts he may be said
to carry the dispensary under his hat. The dispensary
if properly organized should serve as the centre
of official anti-tuberculosis measures. The medical
officer of health receives the notifications of recognised
cases whether they are attending the dispensary
or not; and it simplifies administration if the home supervision
of all tuberculous patients notified to the
medical officer of health, and not only of dispensary
patients, is placed under the supervision of the tuberculosis
officer. At the dispensary itself the tuberculosis
officer examines patients, makes records of their
condition, and of all facts bearing on their welfare,
and recommends the special form of continued treatment
adapted to their condition. This may be domiciliary,
or given at the dispensary, or in a sanatorium,
or in a hospital. A dispensary which does not supervise
and treat a large proportion of the total notified
cases, including especially patients before and after
they have received treatment in a residential institution,
is not fulfilling its possibilities of utility.
At the dispensary is organized also the examination
by the tuberculosis officer of “contacts,” and of school
children suspected to be tuberculous; though it is
often necessary to arrange for this officer to make
similar examinations at patients’ homes. At the dispensary
consultations with private practitioners are
conveniently held; though in this instance also the
tuberculosis officer should arrange when this is desired
for the consultations to be held at the patient’s home.
The dispensary alone cannot ensure the welfare of
the tuberculous patient. It is necessary that the tuberculosis
officer should have consultations concerning
difficult cases with the medical staff of general and
special hospitals. To segregate the treatment of tuberculosis
from that of other diseases means reduced
efficiency of the tuberculosis officers and lowered quality
of treatment.
Public Health and School Authorities have already
established many centres at which hygienic instructions
and medical treatment are given for mothers and
their young children when ailing, or with a view to the
prevention of future illness; for tuberculosis; for
venereal diseases; and for various ailments of school
children.
In England in addition there is poor-law provision
(sometimes at dispensaries) for patients dependent on
official charity. Evidently the multiplicity of authorities,
local and central, concerned in this medical work,
is not conducive to efficiency; and it will, we hope,
soon disappear. Similarly it will be in the interest of
efficiency, as well as of economy, to provide for the
treatment of the above-named groups of cases in a
common Medical Institute for each defined area, at
which also it will be advantageous to arrange for much
of the treatment of insured persons. By this means it
will become practicable to arrange for consultations
between experts in different departments of medicine,
to the advantage of all concerned.
It will be contrary to the communal interest if the
resources of voluntary hospitals in large towns are not
also utilised in official medical work. Many of these
hospitals have specialised departments (e.g., X-ray,
eye, ear, throat, skin, and other special clinics), the
use of which ought to be obtainable, even though for
many years it may not be practicable to arrange for all
hospitals to be financed in part at least out of rates
and taxes.
The tuberculosis officer in order to be able to treat
his dispensary patients with adequate knowledge, and
in order to advise as to the form of treatment—in a
residential institution or not,—most fitted to the patient’s
case, must know the sanitary and social circumstances
of the patient’s industrial and domiciliary life.
He must, therefore, have reports on these circumstances
respecting each patient. This raises the general
question of the relation of the tuberculosis officer
to the medical officer of health. The medical officer
of health is officially responsible for controlling the
tuberculous patient and his environment from a public
health standpoint. As the tuberculosis officer also
needs the information acquired in the inquiries which
it is the duty of the medical officer of health to make
personally or by an authorized agent, coördination of
the work of the two officers is evidently required;
and this need cause no difficulty when the tuberculosis
officer is an officer in the Public Health Department of
which the medical officer of health is the chief administrator.
This is important, (a) to inquire into the social circumstances
of each patient; (b) to instruct him in
detail as to the carrying out of instructions for treatment
and in the hygiene of his life; (c) to make a
sanitary survey of the dwelling house, and especially
of the patient’s bedroom, and to advise as to any
needed reforms; and (d) in certain cases to give actual
assistance in nursing the patient.
The report on these inquiries should be seen by both
the medical officer of health and the tuberculosis officer,
and on them in conjunction with the tuberculosis
officer’s knowledge of the medical condition of the
patient, the subsequent course of supervision and
treatment will depend.
Home visitation can be carried out by nurses attached
to the dispensary or by inspectors of the public
health department. The latter will usually be more
competent in detecting and remedying sanitary defects
in the home; the former in encouraging the patient to
carry out the needed requirements in personal hygiene
and nursing. Many visitors are equally competent in
both directions; and as the number of women specially
trained in tuberculosis work increases this will more
generally be the rule.
The dispensary should be the active working centre
from which home visitation is undertaken; and this is
especially important in “following up” work. Following
up is needed for persons who have been examined
once, concerning whom there is doubt as to their
freedom from disease and who fail to present themselves
for later examination. It is needed also for
patients who have been under treatment and neglect
to continue it; and for patients who after having been
treated have been discharged and fail to report themselves
at intervals as directed. It is important to have
efficient arrangements for ascertaining these leakages
and for making the necessary inquiries. The method
of securing this will vary according to local circumstances;
but the following example given by Dr. Chapman
of an official method may be placed on record:
When a patient is instructed to attend again at the dispensary
his name is noted in a diary under the date upon which
he is asked to attend. In some instances a definite time is
fixed for the appointment so as to save the patient’s time.
The names of all patients who attended the dispensary upon
the day appointed are ticked off as they are seen, and at the
end of the day the names of patients who have failed to
attend remain on the list. Letters are then sent reminding
these patients of their engagement and making another appointment.
If they still fail to attend they are visited by the
dispensary nurse or the health visitor. Failure to attend may
be due to relapse, and, when this is likely, an early visit of
inquiry by the nurse is advantageous.
Examination of a register kept for facilitating work of this
kind showed that the majority of the patients followed up
attended subsequently, and that in the cases of the remainder
non-attendance as a rule was satisfactorily explained.
In areas having, as yet, no adequate system of following
up, an appreciable percentage of patients usually
cease to attend during the course of treatment at
a dispensary, and many are lost sight of after discharge
from a sanatorium. The value of the work of
a dispensary and of after-care work is materially impaired
in the absence of a system of “following up.”
As schemes develop, more stress will doubtless be
generally laid upon this branch of the dispensary
function.
Under the National Insurance Act the annual sum
of 1s 3d (30 cents) was set apart for each insured
person; as the result of subsequent bargaining with
medical practitioners 6d of this was devoted to the
domiciliary treatment of tuberculosis patients (payable
on the number of panel patients on each doctor’s list,
not on the number of his tuberculous patients), the
remainder being payable to local authorities who undertook
the provision of institutions for the treatment
of tuberculous insured patients.
Thus the “Sanatorium Benefit” comprises
A. Domiciliary treatment.
B. Institutional treatment.
(a) Non-residential—Dispensaries.
(b) Residential—Sanatoria,
Hospitals,
Convalescent Homes and
“Farm Colonies.”
Soon after the passing of the National Insurance
Act in 1911 representations were made that tuberculosis
affected non-insured as well as insured; that
treatment of insured could have only partial success
so long as non-insured members of the same household
were neglected; and that this was work for public
health authorities which they were already partially
undertaking. It was evident that the inextricably interlaced
measures for the prevention and the treatment
of tuberculosis must accrue to the whole population;
and the mistake of the National Insurance Act
was remedied to the extent that Public Health Authorities
were informed that the National Treasury
was prepared to pay one-half of the approved expenditure
incurred by these authorities in establishing
schemes for the treatment of tuberculosis available for
the entire population. Such schemes were proceeded
with, as already indicated; but there remained the fact
that insured persons who had paid their weekly quota
and were therefore entitled to “Sanatorium Benefit”
usually interpreted this as a right to three months’
treatment in a Sanatorium. The choice of persons to
receive treatment in a Sanatorium lay with Local
Insurance Committees appointed under the National
Insurance Act, who generally acted on the advice of
the tuberculosis officer; but influences other than medical
led to the unsatisfactory use of institutional treatment.
A large number of patients were sent to and
retained in sanatoria for prolonged periods, who
might have been adequately treated at home, or who
should have been in hospitals. Satisfactory results
for sanatorium treatment were not secured under
these conditions; and there will probably be no material
improvement until the Sanatorium Benefit is withdrawn
as a special benefit under the National Insurance
Act, and the treatment of tuberculosis becomes
an obligatory duty of Public Health Authorities, with
a minimum standard of provision to which all must
attain.
The extent to which these have been provided in
England since 1911 has already been stated. The
number of beds available in 1917 was 12,441, in addition
to some 9,000 beds in poor-law institutions, which
in 1911 were occupied by consumptives. From the
point of view of the provision required in residential
institutions for the treatment of tuberculosis the following
classification is useful. It is confined to pulmonary
cases:
Group A—Cases in which permanent improvement or
recovery can usually be anticipated.
Group B—Cases in which only temporary, though
possibly prolonged, improvement may be
anticipated.
This group will include
1. Patients who may be expected to recover considerable
ability to work, as a result of protracted
treatment.
2. Patients admitted for a short term for educational
treatment.
3. Patients with advanced disease, many of whom improve
greatly under institutional treatment.
Group C—Advanced cases requiring continuous medical
care and nursing.
Group D—Cases requiring Special Observation.
1. Patients admitted for the purpose of diagnosis.
2. Patients needing to be watched, before the best form
of continued treatment can be determined.
Emergency cases, e.g., patients with haemoptysis, and
patients requiring surgical treatment may come
within any of the above groups.
Of the 12,441 beds probably 5,000 are in the hands
of voluntary organizations, and are intended for patients
in group A, though for the reasons set out on
pages 208 and 223 they contain a large proportion of
patients in the other groups. It appears not unlikely,
however, that the total accommodation, official and
voluntary, for patients in group A has reached one bed
per 5,000 population, the accommodation recommended
by the Departmental Committee on Tuberculosis as
immediately advisable. This accommodation is unevenly
distributed and much of it is being utilised for
patients coming within groups B, C, and D. All the
evidence available shows a great need for additional
beds for patients coming within the last-named groups.
The Departmental Committee recommended that the
total needs of the community might be assumed to
amount to one bed to 2,500 population for all stages
of pulmonary tuberculosis, in addition to poor-law accommodation.
This means a provision of some 14,000
beds in addition to the 9,000 poor-law beds, or a total
provision of about one bed to 1,500 population.
If we include cases of non-pulmonary tuberculosis
it may be safely assumed that each community should
aim at having available for the treatment of tuberculosis
at least one bed per 1,000 inhabitants. Fewer
beds may suffice for sparsely populated communities,
and more will be needed in some towns.
In England various existing institutions have been
utilised in the treatment of tuberculosis.
1. Emphasis has already been laid on the large number
of beds in workhouse infirmaries under the Poor-Law
Authorities. Of the historical, as well as of the
present value of this accommodation for advanced
cases of tuberculosis in the poorest section of the population—which
is most seriously exposed domestically
to massive infection,—there can be no doubt.
But there has been prejudice against the use of
this accommodation for insured persons, and such use
is legally precluded; and since the passing of the National
Insurance Act additional provision has been
made by Public Health Authorities, and ere long the
whole of the present poor-law accommodation should
come under public health authorities.
2. Detached pavilions of hospitals for infectious diseases
have also been employed for the treatment of
tuberculosis, and experience has demonstrated that in
well-conducted institutions consumptives are not exposed
to risk of acquiring acute infectious diseases.
The use of these institutions favours economy of
administration. It possesses the advantage that patients
are, as a rule, more accessible to their relatives
than in a sanatorium; and this renders patients suffering
from progressive disease more willing to remain
in the institution than they would otherwise be. Patients
can advantageously be placed in such an institution
for observation, before deciding whether prolonged
treatment in a distant curative sanatorium is
indicated.
Occasionally empty smallpox hospitals have also
been employed for the institutional treatment of tuberculosis;
but if this plan were to be generally adopted,
tuberculosis work would be seriously crippled if smallpox
became epidemic. The treatment of consumptives
in a smallpox hospital should only be permitted for
patients who could be at once transferred and who can
be at once vaccinated.
General hospitals are well fitted to deal with the following
classes of cases of tuberculosis:
(a) Patients admitted for observation, with a view to
diagnosis;
(b) Patients admitted to ascertain the form of treatment
best adapted for the patient’s needs;
(c) Emergency cases, e.g., haemoptysis;
(d) Patients requiring surgical aid for intercurrent
diseases;
(e) Patients with advanced disease admitted for special
purposes;
(f) Patients with non-pulmonary tuberculosis, requiring
special surgical treatment.
In approving arrangements for the treatment of
pulmonary tuberculosis in a general hospital, it should
be made a condition that they shall not be received into
general wards of the hospital in which there are persons
suffering from other diseases, unless for a sudden
emergency, or for a short period for operative treatment,
or unless there is no expectoration, or if this, on
repeated examinations has been found to be free from
tubercle bacilli.
To ensure efficiency in a sanatorium a resident physician
is, as a rule, necessary; and this is desirable also
for a tuberculosis hospital. Smaller authorities may
be unable to combine together or to provide alone an
institution with about 100 beds, which is generally regarded
as the unit best adapted to secure a well-placed
and efficiently organized institution, with due regard
to economy of administration. To provide such a
unit, and even apart from this, the desirability of treating
patients in all stages of disease in the same institution
should be considered. Experience in England
has shown that this combination presents no medical
administrative difficulties, provided that the type of
sleeping accommodation for patients consists chiefly
of rooms for one or two patients or of small wards.
With such an arrangement, if a section of the institution
consisting of one or two bedded rooms or small
wards is devoted to patients needing special nursing,
irrespective of the stage of disease, efficiency is secured,
the special needs of each class of patients can
be met, and—this is especially important—the patient
with advanced disease cannot infer the hopeless character
of his illness from his place in the institution.
Such a combined institution affords the medical and
administrative advantage that the tuberculosis officer
can, as a rule, watch his patients throughout the whole
course of their treatment, both in the residential institution
and at the dispensary.
In choosing a sanatorium an area of at least twenty
acres should be available; and at least one-fifth of an
acre should be allowed per patient. For a hospital a
smaller area is permissible. There should be a floor-space
of at least 64 square feet for each patient; and
the centres of the heads of adjacent beds should not
be distant less than 8 feet measured against the wall.
Experience appears to show that in a large sanatorium
one nurse will generally be adequate for every twelve
patients. In a hospital for advanced patients, or in a
combined institution a larger staff may be required.
There is but little systematised experience as yet of
the employment of observation beds; a difficulty arising
from the fact that the tuberculosis officer under
most local tuberculosis schemes has not been sufficiently
in touch with the medical officers of the residential
institutions to which he sends patients. There
are practical difficulties in the provision of observation
beds on the dispensary premises, including the
difficulty of due regard to economy of administration
in the nursing and treatment of three or four in-patients
at a dispensary. Whatever arrangements are
made for such beds, it is desirable that the tuberculosis
officer should have access to the patients treated in
them.
In 1911 the extent and limitations of the utility of
sanatorium treatment of tuberculosis were already
fairly well recognized by physicians; and it is unfortunate
that in connection with the passage of the National
Insurance Act this treatment acquired a somewhat
political aspect, and became the subject of much
popular misapprehension and exaggeration. Disappointment
necessarily followed on the sending of
patients to sanatoria for treatment with a view to cure
at a stage of disease when anything beyond ephemeral
improvement was impossible. The patients who, under
present conditions, are admitted to sanatoria come
roughly into two groups:
First. Patients with limited disease and little or no
systemic disturbance. Comparatively few patients who
now enter sanatoria come within this group.
Second. Patients with more extensive or acute disease.
In a large proportion of cases within the first
group the immediate result of sanatorium treatment
extending over three to six months is the complete
restoration of general health and working capacity
with arrest of disease. In a large further proportion
of cases in the same group there is recovery of working
capacity and apparent restoration of general health
without complete arrest of disease.
For patients coming within the second group a similar
period of treatment in a sanatorium results:
(a) In restoration of general health and working
capacity with arrest of disease in only a small proportion
of cases;
(b) In recovery of working capacity and apparent
restoration of general health without arrest of disease
in a fair proportion of cases; and
(c) In the remainder, disease progresses steadily
with or without temporary improvement in general
health.
The subsequent history of sanatorium patients varies
greatly. Some of them maintain their health indefinitely
on return to their ordinary life. Others who
have been discharged with arrested disease ultimately
relapse, even if they live under excellent environmental
conditions; and such relapses are excessive among
those who return to unsatisfactory conditions of life
and work.
Among patients discharged from a sanatorium without
arrest of the disease a small proportion ultimately
recover completely, but the majority relapse at a date
which is earlier or later in accordance more or less
with the conditions under which they live and work
and the severity of their disease.
The experience of the last few years has been that
only a small proportion of the patients admitted to
sanatoria are cases in which arrest of the disease can
be anticipated; and this will continue until the disease
is more generally detected at an earlier stage than at
present, and the sanatorium treatment is prescribed
and continued solely in accord with the medical needs
of the patient.
The conditions of local administration of the Sanatorium
Benefit under the National Insurance Act have
led to a very high proportion of consumptives being
treated in sanatoria with a view to cure, who might
advantageously have received educational treatment
for a few weeks and then have been treated at home
or at a tuberculosis dispensary. Furthermore, a large
number of patients with advanced disease have been
sent to sanatoria for whom treatment in a hospital was
more appropriate.
Apart from the question of cure, which with belated
treatment can only be expected in a minority of cases,
the sanatorium serves an important purpose, not only
in restoring patients to a considerable degree of health
and working capacity for a longer or shorter time, but
also in educating the patients how to live and conduct
themselves. A stay in a sanatorium for a short period—a
month or six weeks—under doctors and nurses
who realise the value of this work—would there were
more of these!—secures the training of the patient on
lines beneficial to his future health and enables him to
obviate all danger for others.
In such a short stay in a sanatorium what may be
called tuberculosis discipline can be and is acquired
when the sanatorium is satisfactorily administered;
and the patient thus disciplined is in a much more
favorable position for securing his own welfare and
that of others than the undisciplined patient, just as
the soldier who has had routine drill under a competent
instructor is more efficient than the untrained
recruit.
The preceding remarks as to the treatment of tuberculosis
in sanatoria illustrate certain well-known features
in the natural history of this disease. In the majority
of instances of disease recognised under present conditions
we are dealing with a slowly progressing disease.
This sometimes become spontaneously arrested;
occasionally it may be arrested or its course delayed
under medical treatment at home associated with manageable
changes in domestic and industrial life. In
still further instances it may be arrested by treatment
in a sanatorium; while for other cases sanatorium
treatment, however prolonged, is followed by only
temporary improvement, and the chief benefit thus
received is that of training as to mode of life, which
might have been secured by a much less protracted
stay in the institution, followed by measures supplementing
sanatorium treatment. We have further to
recognise the fact that, under present conditions of
social life and medical practice, many tuberculous patients
will slowly, by intermittent stages, but none the
less surely, die from tuberculosis in the course of one,
three or five years. Regard must be paid to this fact
if our total measures for the control of tuberculosis
are to be successful.
This fact emphasizes the importance of adequate
hospital treatment for all patients acutely ill or bed-ridden,
who cannot be hygienically treated at home;
and the importance becomes evident of exercising
complete supervision over and provision for the whole
of the sick life of the consumptive, whether he is trending
towards complete recovery or to death.
Such complete supervision and provision necessitates
further development in three directions in which
beginnings have already been made:
These are the provision of “Farm or Industrial
Colonies,” the adaptation of domestic dwellings to
meet the special needs of consumptives, and the more
complete organization of “Care” and “After-care”
arrangements.
In a large proportion of cases, the patient on leaving
the sanatorium is unable at once to embark on full
work without risk of early relapse, or to refrain from
this without endangering his nutrition and that of his
family. His work, furthermore, may be unsuitable
for a consumptive.
This has led to many tentative efforts to train the
consumptive in a suitable occupation while under sanatorium
treatment, or in an industrial colony which
should preferably be attached to or in close communication
with a sanatorium, in order that the patient
may continue under skilled medical supervision. The
graduated labour which forms part of the routine
method of treatment in many sanatoria can be made a
preparatory stage in this industrial training. The
training may be made to merge into the pursuit of an
actual livelihood; and then the sanatorium becomes
an industrial colony. Market gardening, pig-keeping,
forestry, and other occupations may be thus pursued
for protracted periods, if the patients are suitably selected.
The ex-patients continue to live under protected
conditions, earning part at least of their livelihood.
Attempts in this direction are not likely to
have wide success unless the patient is re-instated in
his family; and the most promising efforts are those
which install the ex-consumptive with his family in a
cottage near a sanatorium, where he can remain under
partial medical supervision, while engaged in his daily
work. It remains to be seen to what extent such
arrangements are practicable on a considerable scale,
and the experiments now being made will be watched
with interest.
An alternative to the “colony” proposal, which will
probably be found practicable in a much larger number
of cases is to arrange for the ex-patient to be housed
at his home under special conditions and for his work
to be graduated according to his physical condition,
assistance being given by way of payment of rent, or
otherwise to ensure that the patient and his family
live under satisfactory conditions. Proposals have
been made by Dr. Chapman in a report to the English
Local Government Board that in connection with new
housing schemes a certain proportion of the houses
erected should have rooms providing free perflation
of air reserved for consumptive patients. If with this
is combined the assistance indicated above, the risk of
the ex-patient relapsing will be materially reduced, and
the risk of other members of the family becoming
consumptive may be obviated.
Whatever methods are employed, the principle already
enunciated must be maintained that the patient
in his own interest and in that of his family must be
the subject of uninterrupted care and supervision.
In securing this end Care Committees play a valuable
part. Owing to the war their development has
been retarded; but a local scheme for such supervision
and assistance as the members or agents of a
Care Committee can give forms an essential part of a
complete tuberculosis scheme.
These Committees are formed of non-official persons,
inasmuch as a large share of their work is at
present beyond the scope of official possibilities, outside
the poor-law organization; they can help,
(a) in obtaining appropriate work for the ex-patients;
(b) in supplementing his wages;
(c) in providing separate sleeping accommodation for
the patient, additional food or clothing, or in
loaning out an additional bed or bedding;
(d) in aiding the family during the absence of the
patient in a sanatorium, and thus reducing the
temptation to terminate institutional treatment
prematurely, and
(e) in encouraging each patient to take the necessary
precautions and to adopt the special treatment
recommended for him.
Some of these activities overlap into the activities
of the tuberculosis officer and of the visiting nurse of
the local authority; but there need be no practical difficulty
in adjusting this. It is important that Care
Committees should act in coöperation with local authorities,
insurance committees, and charitable agencies,
and should have representatives of these bodies
on them. The medical officer of health and tuberculosis
should also be ex-officio members of their committee.
Summary.—The preceding review of the problem of
tuberculosis may be summarised in a few final statements.
1. Our knowledge of tuberculosis, if fully applied
by combined attack on the disease by all known
methods, is adequate to secure a great reduction in
its prevalence, if not its absolute abolition.
This is true, although certain problems respecting
tuberculosis still need elucidation, e.g., as to improved
methods of treating the diseases, and of increasing
individual immunity during exposure to protracted
infection.
2. Domestic protection is at once practicable against
infected cows’ milk; and control of this source of infection
at its source is also practicable.
3. Of the circumstances favouring the development
of pulmonary tuberculosis industrial dust and domestic
overcrowding are the most potent. More detailed
and systematic supervision of factories and workshops
is needed, followed by general adoption of remedies,
which would increase industrial efficiency as well as
reduce tuberculosis.
4. Tuberculosis is especially a “bedroom infection.”
But improvement in housing is a dual problem, and it
is a blunder to assume that improved housing, so long
as the healthy and tuberculous sick continue to be
housed together, will produce a rapid decline in the
prevalence of tuberculosis. Hospital provision for the
sick is as necessary as improved general housing.