26 



The Philippine Journal of Science 



1917 



Table II. — Comparison of infections by the common intestinal parasites 



with other reports. 



Year. 



Authority. 



Country. 



Examina- 

 tions. 



Infections. 



Individuals 

 infected. 



1893-. 

 1900.. 

 1901.. 

 1904-. 

 1908.. 



1915.. 



Dobson* .. 



India 



1,249 



1,340 



921 



143 



6,259 



7,636 



P. ct. 



107. 28 

 104.90 

 143 

 139. 64 

 186 





P.ct. 



Fearnaide* . 



do 



878 









.do 



100 

 4,482 

 4,106 



CIS, 297 



92 

 4,482 

 3,447 



92 



100 

 84 



67.7 



Anemia Commission ». 





Philippine Islands, Bi- 

 libid Prison, 

 do 



P. H.S.b 











■■' Garrison, This Jouriml, Sec. B (1908), 3, 194. 



i" Report of the Philippine Health Service for the year 1915 (1916) , 16. 



"= Faecal specimens. 



It will be seen from Table I that the number of infections is 

 slightly greater than that found by Dobson or by Fearnside, but 

 much less than that obtained by Garrison. The figures given by 

 Colvert and by the Anemia Commission are not good for com- 

 parison, as the former examined only 100 persons, while the 

 latter's work was for hookworm only and, consequently, not a 

 true statistical statement of infections by intestinal parasites for 

 the general population. The number of infected persons is about 

 70 per cent less than that obtained by Garrison, but almost equal 

 to that reported by the Philippine Health Service in its annual 

 report for 1915. The Filipinos examined by Garrison in Bilibid 

 Prison in 1908 came from different parts of the Islands, and 

 the Philippine Health Service report was for prisoners examined 

 in 1915. Patients of the Southern Islands Hospital (1913-1916) 

 came from the Visayan Islands — mostly from Cebu Island. 

 How can we account for the great difference in results? The 

 report of Bilibid Prison Hospital for 1915 shows 66.68 per cent, 

 or about 1 per cent more than my findings here for patients 

 admitted from 1913 to 1916. For this reason these data may be 

 taken as the true statistical intestinal infection of the Filipinos 

 for the period 1913 to 1916. That the number of infections is 

 less than that obtained by Garrison in 1908 may be due either 

 to the improvement in general sanitary conditions or to the edu- 

 cation of the people with regard to personal hygiene. 

 GEOGRAPHICAL DISTRIBUTION 



Attempts were made to find the infections by localities. In 

 this case the last residences mentioned by the patients were taken 

 as their true residences. The number of infected persons in 

 each locality and the infections by Trichuris, hookworms, and 

 Ascaris alone are compared. 



