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14
SPECIFIC INFECTIOUS DISEASE.
During 1917 there were 3,024 cases of acute infectious disease
notified in the Borough ; of these 36 were subsequently found not
to be suffering from infectious disease, thus reducing the number
of genuine cases to 3,016. The attack rate in respect of the acute
notifiable infectious diseases for the year is 15 per 1,000 living.
The deaths from the chief zymotic diseases numbered 154.
This is equivalent to a zymotic death rate of .78 per 1,000 living
inthe Borough.
A.—NOTIFIABLE INFECTIOUS DISEASE (ACUTE).
Small-pox.—No case of this disease was notified in the Borough
during 1917.
Scarlet Fever or Scarlatina.—The number of cases of scarlet
fever notified during 1917 was 305 but of these 13 were found afterwards
not to be suffering from this disease, thus reducing the
genuine cases to 292. This is a decrease of 105 upon the number
of genuine cases notified during 1916.
The attack rate for scarlet fever is 1.5 per 1,000 persons
living. The number of cases removed to hospital was 263 which
is over 95 per cent. of the total notified.
The deaths from this disease numbered 7, which is equal to a
mortality rate of 2'4 per cent. attacked and .03 per 1,000 living.
Diphtheria and Membranous Croup.—There were 306 cases of
diphtheria and membranous croup notified during the year, but of
these 20 cases were found subsequently not to be suffering from
diphtheritic disease, thus reducing the genuine cases to 286. This
is a decrease of 65 upon the number of cases occurring during 1916.
The attack rate is 1.4 per 1,000 living. There were 273 cases of
diphtheria and membranous croup removed to hospital during
1917. This is equal to 97 per cent. of the cases notified.