View report page

123
[1906
In the Quarters.-In the First Quarter the number of cases notified
was 472, which produced an annual attack-rate of 5.47 per 1,000 of the
inhabitants. They were 80 below the corrected average (552) which obtained
in the first quarter of the preceding 10 years. This was due to a decrease on
the average of the 10 years of 14 Small Pox, 47 Diphtheria, 2 Membranous
Croup, 21 Enteric Fever, 16 Erysipelas, 1 Puerperal Fever and of 1
Continued Fever. The quarter, as judged from these returns, was eminently
healthy. The return showed an increase of 21 cases of Scarlet Fever on the
corrected average (256) of the first quarter, 1896-1905.
In the Second Quarter, the cases, which numbered 484. produced an
annual attack-rate of 5.61 per 1,000 of the inhabitants, were 74 below the
average (558) of the corresponding quarters of the preceding 10 years. The
decrease included 17 cases of Small Pox, 64 Diphtheria, 3 Enteric Fever,
5 Erysipelas, and 2 Continued Fever. The return showed an increase of
22 cases of Scarlet Fever on the corrected average of the corresponding period
for 10 years.
In the Third Quarter 569 cases, producing an annual attack-rate of
6.6o per 1000, were notified, as compared with an average of 726 in the
corresponding period of the preceding 10 years. The decrease of 157 cases
included 4 Small Pox, 47 Scarlet Fever, 68 Diphtheria, 14 Enteric Fever,
21 Erysipelas, and 3 cases of Continued Fever.
In the Fourth Quarter there was 750 cases notified, which represent an
attack-rate of 870 per 1,000 of the inhabitants, as compared with the
corrected average of 814, and an attack-rate of 943 in the corresponding period
of the preceding 10 years. The decrease of 64 included 5 cases of Small Pox,
56 Diphtheria, 40 Enteric Fever, and 2 cases of Puerperal Fever. The return,
however, showed an increase, on the corrected average, of 21 cases of Scarlet
Fever and 19 cases of Erysipelas.
Fatality.-By the term "Fatality" in this report is meant the percentage
proportion of deaths to the cases of infectious disease notified. It is a means
of estimating the virulence of a disease.
In the year under observation there were 115 deaths among the 2275
cases that had been made known by medical practitioners, and these were
equal to an annual fatality of 5 per cent., which is the lowest percentage