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53
Patients
notified as Dates
Distributors Dates of having of
as stoppage of sickened out- onsets
"Carriers" work. side the of
periods of farm attacks.
infection.
No. 1 Dec. 3 0 —
No. 2 Dec 23 2 { Dec.17 Dec.30
No.12 Dec. 18 1 Dec. 16
No.19 Dec. 18 2 ( Dec 16* Dec.16
Dec. 17
"Odd" man E.F. Dec. 18 4 Dec.18 Dec.21
Dec. 26
Cases previously notified in the houses.
N B.—Pasteurisation commenced December 12th.
It will be noted that there are 2 cases, that sickened
on December 26th and December 30th, 1913, respectively,
that do not appear to fit in with the theory of a "carrier"
infection, though these cases may be explained on a
basis of a longer incubation period than 3 days, or of
an error of observation as to the exact dates of onset.
The remaining 7 cases contain 4 secondary castes, leaving
3 to be explained by "carrier" infection, the dates of
onset being December 16th, December 17th, and December
18th respectively.
These figures do not prove anything very satisfactorily
but, in this connection, it must be remembered (1) that
the pasteurisation of all farm infected milk prior to its
distribution, on and from December 12th, was a very
radical measure, and (2) that pasteurised milk is less
likely to become infected, the diphtheria bacillus tending
to die or become inoperative in such a medium.
Bacteriological Results connected with the employees of Dairy X.
of Dairy X.
A large number of bacteriological examinations was
carried out in connection with the outbreak. The whole
of the employees and the proprietors of the suspected