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70
Infectious Diseases of the Nervous System.
The incidence of Cerebrospinal Meningitis, Acute Anterior Poliomyelitis
and Encephaliti; Lethargica is separately set forth below:—
Cerebro-spinal Meningitis.
During the decennium 1915-1924, the yearly notifications averaged
three cases. The figures since then are as follows:—
Average Average
1925 1929 1930-1934 1935 1936 1937
Cases 3 3-6 .3†
3 1
Deaths 1.4 3 4 2
†Including one case of Posterior Basal Meningitis.
Acute Poliomyelitis.
The average number of notifications received between 1915-1924
was two. The figures since 1924 are as follows: —
Average Average
1925-1929 1930-1934 1935 1936 1937
Cases2.6 1.6 — — 5
Deaths ... ... —
Encephalitis Lethargica.
During the five years terminating 1924 (in which year the incidence
reached its peak) the average annual number of cases notified was
three. The subsequent figures were :—
Average Average
1925-1929 1930-1934 1935 1936 1937
Cases 5 0.4 1 —
Deaths 2.4 1 — 12
All cases are periodically re-visited and treatment offered.
Pneumonia.
Both Acute Primary and Influenzal Pneumonia are notifiable, and