In this thesis the aetiology
and significance of eosinophilia in general
has beer. discussed.
A series of twenty-five cases
is reported fully where an increase in the
blood eosinophil: count was present in all.
Observations on all the cases
have been made in the commentaries on each and
a discussion of the findings is finally conducted.
The significance of eosinophilia
in the native of South Africa has an important
bearing on the public health eradication of
excremental disease and prevention of
In the solution of these
problems three major facts are evident
from this study. They are:-
1. The native who is
responsible through his own peculiar
social conditions, for the dissemination
of excremental disease seldom complains
of alimentary tracts disorders when seeking.
If a particular symptom be
present in his case it usually is attributed
to the respiratory system.
2. The sick African native
with pulmonary symptoms should be closely
studied with a view to the exact aetiology
of his pulmonary syndrome.
This was shown in the case
series to be almost invariably due to a parasitic alimentary pathology; which when
eradicated spontaneously cleared the pulmonary
The pulmonary signs seen
radiologically simulated tuberculosis in
several of the cases studied and unless the
medical attendant is on the watch for a parasitic cause the man may inadvertently
be diagnosed as tuberculous and suffer
3. In many instances-parasites
were only isolated after repeated and again
repeated examinations of the stool.
It is unfortunately too easy
a practice to treat the patient symptomatically,
search once or even three times in the stools
for parasites, and discharge him after a short rest.
This attitude will not help
to clear the country of infestation.
If an eosinophil count were to be
taken of every medical admission to hospital
whatever the symptomatology, and when found
positive the cause searched for and eradicated
much saving of pulmonary syndrome and other
symptom complex therapy would be effected
and the interests of public health in South