270 RISSLER AND GOMEZ. 



INFECTIONS WITH STRONGYLOSES. 



The distribution of this parasite varies according to the locality. 

 Garrison 8 in 1908 found 3 per cent infected among the Bilibid prisoners. 

 In 1901 Strong ° reported 13 cases of Stronglyloides (0.6 per cent) 

 among 2,179 persons examined in the Philippines. We found 135 

 persons infected (2.24 per cent) in Las Pifias, but not a single case in 

 Tuguegarao and Santa Isabel. 



INFECTIONS WITH OXTUKIS. 



The statistics regarding this parasite can not be accurate, for we depend 

 for its diagnosis upon the finding of the egg which is laid outside the anus 

 and which often does not appear with the faeces. "We found 4.95 per cent 

 in Las Pinas. 2.62 per cent in Tuguegarao, and 1.24 per cent in Santa 

 Isabel. 



INFECTIONS WITH AMCEBiE. 



Previous examinations of stools made in the Philippines have shown a high 

 percentage of Amoeba?, varying from 20 to 70 per cent. Oilman 10 reported 32 

 cases showing active amoebic ulcerations out of 100 autopsies at the Philippine 

 Medical School. Musgrave and Clegg u found 2G per cent and Garrison 12 23 per 

 cent of the immates of Bilibid Prison infected. Garrison, Leynes and Llamas u 

 found 2.7 per cent in Taytay. 



Our figures are still lower, we having found but 0.39 per cent infected 

 in Las Pifias. Nearly all of these were free from clinical symptoms. In 

 Tuguegarao and Santa Isabel we did not find a single case of infection 

 and a typical stool with blood and mucus was not seen. 



INFECTIONS WITH FLAGELLATES AND CILIATES. 



In Las Pinas we found 3.8S per cent infected with monads and 0.14 

 per cent with Balantidium coll. In Tuguegarao 3.73 per cent with 

 monads and in Santa Isabel 1.49 per cent. Neither the Balantidium 

 coli nor any other ciliate was found in these two places. 



INFECTIONS WITH TAPEWORMS. 



Taenia saginata was most frequently found. Only 4, or 0.06 per cent, 

 out of 6,000 cases examined at Las Pifias were infected with tapeworm. 

 In Tuguegarao the percentage is eight times higher, 0.50 per cent, and 

 in Santa Isabel twenty times, 1.37 per cent. The high percentage in 



8 This Journal, Sec. B (1908), 3, 201. 



"Report of the Surgeon-General, United States Army (1901), 203. 



w This Journal, Sec. B (1908), 3, 217. 



11 Ibid. (1906), 1, 909. 



12 Ibid. (1908), 3, 200. 

 "Ibid. (1909), 4, 257. 



