29() STRONd. 



1.000 persons in tlic Imwii sIiowihI tliiit 9.i per cent ol' the ])e()])le were 

 infected with pomc i'oiMi of intestinal woi'iri. The results of thc'se exami- 

 nations are in accord with tliose which liave been caniod out by Doctor 

 Gari'ison. and his assistants in the city of Manila, which have showed that 

 the Filipinos are almost universally infected with the.^e parasites. 



No evidence was found of infection witli ccstodes or treniatodes in 

 Taytay. In Manila cases of cestode infection are not unconunon, tcenia 

 having been found in 0.7 per cent of the cases examined in Bilibid Prison 

 and in 0.66 per cent in children. The fact that the diet of the people of 

 Taytay so seldom contains any meat evidently accounts largely for the 

 absence of Ta?nia saginata and Tania solium infection among them. 



With respect to treniatodes it may he mentioned that few cases of 

 paragonimus infection have been found in the Philippines in which the 

 infection was probably acquired as far north as Manila. The majority of 

 the cases have been discovered in the southern provinces or in the Islands 

 south of Luzon. This affection is endemic in portions of Samar. In- 

 fections with Schistosomum japonicum and pisihorrisi sincnfiis also 

 appear more common in the southern islands than in Luzon. Prom 

 reports that have reached Manila it seems not improbable that infection 

 with Filaria medinensis (the guinea worm) occurs among the Moros in 

 some of the southern islands of the Archipelago. No authentic case, 

 however, has yet been reported from the Philippines. 



An attemjit to discover any localization in groups of the cases 

 infected ■\\'ith Ascaris, hookworms, Trichwis, Strongyloidcs, O.ryuris or 

 Aiiiu'ha in an}' part of the town of Taytay, in proximity to certaiii wells 

 or streams, by families or occupations, gave negative results. 



It was 2:)erhaps surprising that only 2.7 per cent of the persons examined 

 weie found to be harboring amwhcv, since in Bilibid Prison, where the 

 water supply of the piisoners is carefully sterilized, 23 per cent of the 

 prisoners had been fo\md to have amcehcv in their stools. However, it 

 is needless to emphasize that the examinations at Taytay were performed 

 M'ith very great care. It was thought that encysted forms of amwhd' were 

 discovered in eleven individuals, but no reliance can be placed upon ob- 

 servations relating to the presence of encysted forms of aiiufh(c in the 

 stools. Only in cultures of ama;ha> and certainly not in the fa^-es, can 

 one be certain of recognizing encysted forms. The 27 cases discovered 

 with amwhw were evenly divided between the two sexes, and showed no 

 excessive frequency of infection in any single age group. 



Only n.G ])ei' cent of those examined were found to harbor hook- 

 worms, aiul iiouc (if them ]>iesente(l any symptoms of disease which could 

 be attriluited definitely to this parasite. Eighty-two and nine-tenths 

 ]jer cent were found to harbor Ascaris. and about 77 per cent Triclmris. 

 It is interesting in this respect to compare the studies of a similar nature 

 canied on in individuals in Manila by Doctor Carrison and his assist- 

 ants. In the neighborhood of 3,000 examinations were made in Bilibid 



