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18
Diphtheria says "the limit between an almost
immediate operation of the infection and a delay of six
or seven days practically covers the period of incubation
for preventive purposes." Oertel in an article on
Diphtheria says:" we may state positively that the
latent course of Diphtheria occupies from two to five
days."
No. 4.—There were 4 cases occurred in this
house after the return of the primary one on March
22nd, the cases being notified on March 28th, April
4th, 4th and 12th, there was thus a period of 22 days
between the return of the first and the notification of
the last case.
No. 9 appears to have been undoubtedly a return
case, because the report says that the primary case
had a nasal discharge after returning home. This
seems to illustrate the point mentioned by Dr.
Simpson that "a warm bath immediately before
discharge from the hospital and under the conditions
which obtain in winter in this country has apparently,
in the cases which I have investigated, especially in
the more delicate and weakly children, aggravated or
revived the infection." I was so much struck with