AnnualReport-1931 — Page 368

Administrative Reports 行政報告書 All AI Reviewed

Page 33

114. Plague as an epidemic disease has disappeared from Hong Kong and the same may be said of South China. The whole truth concerning the factors which have caused this disappearance are not known. The disappearance from Hong Kong may be, and probably is, due in some degree to the sanitary measures which have been and are being taken but this cannot be the case in many of the Chinese towns where the conditions are as they have always been. The fact is the cause of the rise and fall in plague figures has not been satisfactorily explained. We know that plague is a disease of rats communicated to man through the medium of the rat flea, but we know little of the reason for the rise and fall in the incidence of the disease among rats or what natural causes have an influence on the virulence of the plague bacillus. In spite of the continuous campaign against them, owing to the rapidity with which they multiply, there still is and probably always will be a sufficiency of rodents in the Colony to light up and maintain an epidemic. The value of a continuous anti-rat campaign lies in the early information it affords of an epizootic.

115. The cases of Plague recorded in the Colony since the discovery of this disease in 1894 are given in the following Table:-

Year Cases. Year. Cases 1894 5,000 1913 408 1895 44 1914 2,146 1896 1,204 1915 144 1897 21 1916 39 1898 1,320 1917 38 1899 1,486 1918 266 1900 1,087 1919 464 1901 1,651 1920 138 1902 572 1921 150 1903 1,415 1922 1,181 1904 510 1923 148 1905 272 1924 0 1906 893 1925 1 1907 240 1926 0 1908 1,073 1927 0 1909 135 1928 4 1910 25 1929 2 1911 260 1930 0 1912 1,957 1931 0

Enteric.

116. The number of cases reported was 214 as compared with 221 for the previous year. All the cases were sporadic and, as is usual in such, the source of infection could not be traced. There is no evidence that any case contracted the disease through the public water supply.

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Page 33 114. Plague as an epidemic disease has disappeared from Hong Kong and the same may be said of South China. The whole truth concerning the factors which have caused this disappearance are not known. The disappearance from Hong Kong may be, and probably is, due in some degree to the sanitary measures which have been and are being taken but this cannot be the case in many of the Chinese towns where the conditions are as they have always been. The fact is the cause of the rise and fall in plague figures has not been satisfactorily explained. We know that plague is a disease of rats communicated to man through the medium of the rat flea, but we know little of the reason for the rise and fall in the incidence of the disease among rats or what natural causes have an influence on the virulence of the plague bacillus. In spite of the continuous campaign against them, owing to the rapidity with which they multiply, there still is and probably always will be a sufficiency of rodents in the Colony to light up and maintain an epidemic. The value of a continuous anti-rat campaign lies in the early information it affords of an epizootic. 115. The cases of Plague recorded in the Colony since the discovery of this disease in 1894 are given in the following Table:- Year Cases. Year. Cases 1894 5,000 1913 408 1895 44 1914 2,146 1896 1,204 1915 144 1897 21 1916 39 1898 1,320 1917 38 1899 1,486 1918 266 1900 1,087 1919 464 1901 1,651 1920 138 1902 572 1921 150 1903 1,415 1922 1,181 1904 510 1923 148 1905 272 1924 0 1906 893 1925 1 1907 240 1926 0 1908 1,073 1927 0 1909 135 1928 4 1910 25 1929 2 1911 260 1930 0 1912 1,957 1931 0 Enteric. 116. The number of cases reported was 214 as compared with 221 for the previous year. All the cases were sporadic and, as is usual in such, the source of infection could not be traced. There is no evidence that any case contracted the disease through the public water supply. Page 33

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M 33 114. Plague as an epidemic disease has disappeared from Hong Kong and the same may be said of South China. The whole truth concerning the factors which have caused this dis- appearance are not known. The disappearance from Hong Kong may be, and probably is, due in some degree to the sanitary measures which have been and are being taken but this cannot be the case in many of the Chinese towns where the conditions are as they have always been. The fact is the cause of the rise and fall in plague figures has not been satisfactorily explained. We know that plague is a disease of rats communicated to man through the medium of the rat flea, but we know little of the reason for the rise and fall in the incidence of the disease among rats or what natural causes have an influence on the virulence of the plague bacillus. In spite of the continuous campaign against them, owing to the rapidity with which they multiply, there still is and probably always will be a sufficiency of rodents in the Colony to light up and maintain an epidemic. The value of a continuous anti-rat campaign lies in the early information it affords of an epizootic. 115. The cases of Plague recorded in the Colony since the discovery of this disease in 1894 are given in the following Table:- Year Cases. Year. Cases 1894 5,000 1913 408 1895 44 1914 2,146 1896 1.204 1915 144 1897 21 1916 39 1898 1.320 1917 38 1899 1,486 1918 266 1900 1.087 1919 464 1901 1.651 1920 138 1902 572 1921 150 1903 1.415 1922 1.181 1904 510 1923 148 1905 272 1924 0 1906 893 1925 ก 1907 240 1926 0 1908 1.073 1927 0 1909 135 1928 4 1910 25 1929 2 1911 260 1980 0 1912 1.957 1931 0 Enteric. 116. The number of cases reported was 214 as compared with 221 for the previous year. All the cases were sporadic and, as is usual in such, the source of infection could not be traced. There is no evidence that any case contracted the dis- ense through the public water supply.

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M 33

114. Plague as an epidemic disease has disappeared from Hong Kong and the same may be said of South China. The whole truth concerning the factors which have caused this dis- appearance are not known. The disappearance from Hong Kong may be, and probably is, due in some degree to the sanitary measures which have been and are being taken but this cannot be the case in many of the Chinese towns where the conditions are as they have always been. The fact is the cause of the rise and fall in plague figures has not been satisfactorily explained. We know that plague is a disease of rats communicated to man through the medium of the rat flea, but we know little of the reason for the rise and fall in the incidence of the disease among rats or what natural causes have an influence on the virulence of the plague bacillus. In spite of the continuous campaign against them, owing to the rapidity with which they multiply, there still is and probably always will be a sufficiency of rodents in the Colony to light up and maintain an epidemic. The value of a continuous anti-rat campaign lies in the early information it affords of an epizootic.

115. The cases of Plague recorded in the Colony since the discovery of this disease in 1894 are given in the following Table:-

Year

Cases.

Year.

Cases

1894

5,000

1913

408

1895

1914

2,146

1896

1.204

1915

144

1897

1916

1898

1.320

1917

1899

1,486

1918

266

1900

1.087

1919

464

1901

1.651

1920

138

1902

572

1921

150

1903

1.415

1922

1.181

1904

510

1923

148

1905

272

1924

1906

893

1925

ก

1907

240

1926

1908

1.073

1927

1909

135

1928

1910

1929

1911

260

1980

1912

1.957

1931

Enteric.

116. The number of cases reported was 214 as compared with 221 for the previous year. All the cases were sporadic

and, as is usual in such, the source of infection could not be traced. There is no evidence that any case contracted the dis- ense through the public water supply.

AnnualReport-1931 — Page 368

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