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(d) Not much evidence was obtained in reference to shellfish infection.
One case developed the disease 9 days after eating mussels, and
another 10 days after eating winkles. Two other cases gave
indefinite histories of having eaten shellfish.
(e) No source of infection was traced in the other 16 cases. It is to be
remembered that many of these cases work outside St. Pancras, and
that in most cases it is very difficult to obtain a record of the patients'
previous movements, food, etc.
No "carrier" cases or spread of infection through milk or other foodstuffs
have been unmasked, although a careful watch has been kept.
Bacteriological Examinations.—39 specimens of blood of St. Pancras patients
were examined by the Lister Institute of Preventive Medicine for the Widal
reaction of typhoid fever at the expense of the Borough. Of these 14 gave
positive results, and 25 negative results.
ANTERIOR POLIO-MYELITIS.
3 cases of anterior Polio-Myelitis were notified during 1914.
In one of these cases the diagnosis was doubtful, and the patient died three
months afterwards of "intestinal toxaemia." The other two cases recovered.

Careful inquiries were made in each case and no source of infection or
relation between the cases was discovered.