vni, B, 1 Willets: Public Health in the Batanes Islands 



55 



an average of 85.66 per cent was found to be infected.' The 

 highest percentage (95.9) was found by Garrison, Leynes, and 

 Llamas * in the study of 1,000 inhabitants of Taytay, Rizal 

 Province. In these studies the average Asca^'is, Trichuris, and 

 hookworm infections were 61.36, 40.79, and 30.57 respectively. 

 It is, therefore, clear that the high rate of infection with in- 

 testinal worms in the Batanes is due to the great frequency 

 of ascariasis. The results of the present study are given in 

 Tables I and II. 



Table I. — Frequency of infection with intestinal worms in the iOO persons 



examined. 









Infections 





Sex and age. 



Examined. 



Infected. 







1 











Singrle. 



Double. 



Triple. 



Children: 













Male 



100 



100 



46 



44 



10 



Female 



100 



100 



61 



43 



6 



Adults: 













Male ._. 



100 



100 



45 



42 



13 



Female 



100 



100 



42 



i-i 



17 



Totals 





400 



400 



184 170 



46 



Percentage __. 





100 



46.0 42.5 



11.5 



Table II. — Frequency of infection with various parasites in the 400 persons 



examined. 



1 



Sex and age. 



Exam- 

 ined. 



Ascaris. ™«- 



TIS, 



Hook- 

 worm. 



Oxyuris. 



Strongy- , 

 loides. 



Children: 



Male 



8 8 8 8 



93 50 

 96 44 



87 42 

 95 51 



18 

 14 



38 

 28 



2 

 



1 

 1 



1 

 1 











Female 



Adults: 



Male 



Female 



Totals 



Percentage... 



400 



371 j 187 ; 98 

 92 8 1 46 7 1 '''• s 



4 1 2 

 in n K 1 



i 









1 



A part of an epidemic of measles was observed. The in- 

 fection had been carried to the Batanes by a child who had 

 been in Manila for medical attention in January, 1912. There 

 were numerous cases of measles in Manila at that time. The 

 epidemic was confined to the town of Santo Domingo de Basco. 



'Willets, This Journal, Sec. B (1911), 6, 77. 

 'Ibid. (1909), 4, 207. 



