﻿176 The Philippine Journal of Science 1914 



Table VIII. — Incidence of spleen enlargement, by districts and countries. 



District. 



Total 

 ntun- 

 ber ex- 

 amined. 



Albay 



Ambos Camarines 



Antique 



Bataan 



Batanes 



Batangas 



Bulacan 



Bohol 



Capiz 



Cavite — 



Cebu— 



Ceylon 



Corregridor 



England 



Guam .-. 



Honolulu-.- 



IlocosSur 



II0CO8 Norte 



Iloilo-- — - 



India _ 



Japan- - 



Lagruna 



La Union 



Leyte 



1 

 4 



47 

 5 

 1 



19 



29 



4 



112 



2 



Pos- 

 itive 

 spleen 

 index. 



16 



22 

 3 



38 

 6 

 7 

 4 



Per- 

 cent- 

 age. 







100.0 



8.5 



40.0 1 



! 



37.0 il 



44.9 



25.0 



32.1 



42.5 



31.3 























26.6 







17.2 







29.0 



50.0 







25.0 



District. 



Total 

 num- 

 ber ex- 

 amined. 



Malay States 



Marinduque 



Mindanao 



Mindoro 



Naga 



Nueva Ecija 



Nueva Vizcaya 



Occidental Negros - 

 Oriental Negros -.- 



Palawan 



Pampanga 



Pangasinan 



Rizal 



Romblon 



Samar --. 



Singapore 



Sorsogon 



Surigao 



Tablas 



Tarlac 



Tayabas -. 



United States 



Zamboanga 



Not given 



1 



2 



4 



74 



1 



26 



1 



32 



2 



29 



37 



38 



62 



5 



4 



3 



6 



1 



5 



153 



8 



7 



1 



2 



Pos- I Per. 



itive il" 



spleen ""t- 



index. ^«^- 





 1 

 1 



36 

 

 7 

 1 

 7 

 1 

 

 6 



14 



11 

 1 

 1 

 2 

 1 

 

 3 



49 

 1 

 

 

 







50.0 

 25.0 

 48.6 







26.9 



100.0 



21.8 



50.0 







16.2 

 37.0 

 16.1 

 20.0 

 25.0 

 66.6 

 16.6 





 60.0 

 32.0 

 12. B 















These marked variations in the percentage of infection of 

 persons coming from different provinces indicate that a certain 

 number of these people already were infected with malaria 

 before their arrival in Mindoro. This statement is inferen- 

 tially corroborated by subsequent statistics made by "preem- 

 ployment" examination of people who are going to Mindoro. 

 These laborers are recruited from various provinces of the 

 Islands, and, roughly speaking, the "spleen index" among this 

 class of people is averaging about 10 per cent. Therefore, it 

 seems logical to conclude that approximately 10 per cent of the 

 malaria of Mindoro is imported through the new recruits con- 

 stantly arriving from all parts of the Islands. 



The second source of infection is found in the barrios near 

 San Jose. From the extensive infection of these places and 

 the close travel association between them and San Jose, it is 

 believed that approximately 5 per cent of the San Jose malaria 

 may be accounted for in this way. Thirdly, the remaining 15 to 

 20 per cent of the total infected with malaria at San Jose are 

 accounted for by the spread of the infection in San Jose and 



