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25.
INFECTIOUS DISEASES.
Incidence. Full particulars of all notifiable
diseases, arranged according to disease, ward and age
will be found in Table IV., page 36.
The number of cases of infectious diseases notified
during 1930 was 4,229, compared with 2,755 in 1929.
The increase was mainly due to the epidemic of Measles;
excluding measles 1,703 cases were notified in 1930 compared with 1,807 in 1929.

The Diphtheria notifications increased from 370 in
1929 to 402 in 1930 and the number of cases of Scarlet
Fever rose from 489 to 595. The notifications of
influenzal and primary pneumonia were 207 in number
in 1930 compared with 345 in 1929. There was also a
decrease in the number of notifications of tuberculosis,
296 new cases being notified as compared with 364
vduring 1929 (see page 59). Erysipelas notifications;
numbered 74 in 1930 as compared with 78 in 1929, and
cases of infantile diarrhoea decreased from 36 during
1929 to 31 during 1930. The number of cases of infectious
disease of the nervous system of which 15 were
notified in 1929 decreased to 7 in 1930. These included
2 cases of encephalitis lethargica (sleepy sickness), 2 of
cercbro-spinal meningitis (spotted fever) and 3 of poliomyelitis
(infantile paralysis).
Mortality from Infections Disease. There were
368 deaths from notifiable diseases in 1930 compared
with 511 in 1929. The decrease was largely due to the
smaller number of deaths from pneumonia (148