268 RISSLER AND GOMEZ. 



The present report covers the period from June, 1909, to February 8, 

 1910, during which time the party was in the field. Further work is 

 being pursued in the districts near at hand and this will be reported 

 upon when the studies are completed. 



About three-fourths of the cases examined at Las Pinas resided in other 

 towns of Cavite and Rizal Provinces. The principal occupations of the people 

 are fishing and working in the rice paddies and salt beds. The same may be 

 said of the majority of inhabitants coming from other towns of these provinces, 

 although in the latter the percentage of the people that do not actually work on 

 the farm or at the fisheries or salt beds is greater, many of them being of the 

 wealthier classes, such as landowners and merchants, while others' are employed 

 at the navy yard and railroad. 



Many of the people examined in Tuguegarao, such as landowners, merchants, 

 employees, and school children, did not actually work on the farm. The great 

 majority of the inhabitants of the Cagaya'n Valley are much more ignorant 

 than those of the provinces situated nearer to Manila and hence they hesitate 

 more in submitting to medical treatment than do the enlightened classes. It 

 should be emphasized that the majority of the enlightened Filipinos, and conse- 

 quently those having greater confidence in scientific medical treatment, do not, 

 as a rule, work on the farm. 



The actual working class in the hacienda of Santa Isabel was examined, and 

 in this investigation the field party was greatly assisted by the manager and 

 the municipal officer. 



The people here are almost entirely occupied in planting and cultivating 

 tobacco, and for this purpose much field work is necessary. The men plow the 

 land and with the women do the planting. When the tobacco stalks are suffi- 

 ciently large, men, women, and the older children examine every plant in order 

 to rid it of any worms present. Consequently, during the whole season of growth 

 the workers are almost constantly in the fields. The soil consists of loose clay. 



INFECTIONS WITH ASCARIS. 



Contrary to the findings of Garrison 5 at Bilibid Prison, we found 

 Ascaris lumbricoides to be the most prevalent intestinal parasite. In Las 

 Pinas, 77.21 per cent of the whole population is infected; in Tuguegarao, 

 73.51 per cent, and in Santa Isabel, 60.59 per cent. The infection is 

 greatest among children and greater in adult females than in adult 

 males, as is shown by the examinations made at Santa Isabel, namely, 

 70.58 per cent in children, 53.31 per cent in females, and 51.09 per cent 

 in males. 



INFECTIONS WITH TRICHUEIS. 



Garrison ° found this infection to be the most frequent in his 1,106 

 cases in Bilibid Prison. However, we found it to be second to Ascaris. 

 This difference may be due to the. fact that Garrison's statistics in Bilibid 

 Prison are based for the greater part on an adult male population. In 



''This Journal, Sec. B (1908), 3, 191. 

 'Ibid., 197. 



