MEDICAL SURVEY OF THE TOWN OP TAYTAY. 265 



be investigated^ but the rarity of clinical evidence of hookworm disease 

 in sandy as well as in clay districts would seem to make it improbable 

 that any great difference will be found in this respect. 



STRONGYLOIDES AND OXYUEIS. 



0.7 per cent. 0.4 per cent. 



The presence of these pai'asites has been noted frequently by various 

 workers in the Philippines but never in a high percentage of cases. 

 Among the Bilibid prisoners 3 per cent were infected with Strong yloides 

 and 0.8 per cent with Oxyuris. Manila children gave 2 infections with 

 pinworms among 1-58, or 1.26 per cent. Strong in 1901 reported 13 

 cases of Strongyloides (0.6 per cent) among 2,179 persons examined in 

 the Philippines. 



Adult specimens of pinworms were obtained from two of the Taytay 

 cases and were determined as Oxyuris vermicularis (Linnaeus), 1767. 

 No adult Strongyloides were sectired, only the embryos being found. 



INTESTIA'AL PROTOZOA. 



AMCEBA. 



2.7 per cent. 



In \a"rious series of examinations of stools in the Philippines, the 

 percentage of intestinal amoebce reported has varied from something 

 over 20 per "cent to as high as 50 and even 70 per cent. In one hundred 

 autopsies at the Philippine Medical School, Gilman reported t3^ical, 

 active, amoebic ulceration of the large intestine present in 32 cases. In 

 examinations at Bilibid Prison 26 per cent (Musgrave and Clegg) and 

 23 per cent (Garrison) of the prisoners have been reported to have motile 

 amoebcE in their stools. 



At Taytay, the stools of only 27 persons in the thousand examined 

 showed motile amoebce. Eleven other cases showed encysted bodies which 

 we felt were prol)ably unnvbrp but the diagnosis could not be made with 

 certainty. 



About one hundred specimens of faeces included in our figures were 

 a day old when brought to us and had these shown amoebic infections 

 proportionately as did the others our total figures would be raised to 

 about 30 infections, or 3 per cent. 



It was a matter of no little surprise to those engaged in this work that 

 the number of amoebic infections should fall so far short of what both 

 others and we ourselves had found in previous examinations of Filipinos, 

 but throughout tlie course of the work and with special care in searching 

 for these infections the figures remained proportionately the same. 



No attempt wa.s made to differentiate between Entamoeba coli and E. 

 histolytica. 



