510 CHAMBERLAIN, BLOOMBERGH, AND KILBOURNE. 



It will be observed that the percentages for males are not very 

 markedly below that found for the Igorot laborers at Baguio. 



As far as we could see on mere inspection, the Igorot men who were 

 infected with uncinaria were little affected by the presence of the 

 parasite. Bowman could find no relation existing between hookworm 

 infection and the health of the children. This experience is in accord 

 with observations made elsewhere in the Philippines and leads to the 

 conclusion that uncinariasis is not the serious menace to the health and 

 progress of the Filipino that it has been found to be in the case of the 

 natives of Porto Eico and the white man in the southern part of the 

 United States. 



EXAMINATIONS OF BLOOD FOR PARASITES. 



Examinations for Filaria nocturna were made on the blood of 100 

 adult male Igorots. The specimens were obtained between 9 and 11 

 o'clock p. m. in the form of a thick smear, the haemoglobin was washed 

 out and the preparations then searched for the parasite, with negative 

 results in every case. 



An examination of the blood of 6,400 inhabitants of the Philippine 

 Islands by former members of this Board has given some idea of the 

 prevalence of filariasis in different parts of the Philippines. ( 5 ) The 

 disease appears to be of most frequent occurrence in Bohol, Leyte and 

 especially the extreme southern end of Luzon where the infection rates 

 among the natives range from 5 to 10 per cent. Northern Luzon showed 

 rates ranging from 0.2 to 0.8 per cent. This is the first work done by the 

 Board in the mountain regions of Benguet and Lepanto-Bontoc and, in 

 so far as such a small number of examinations is of value, indicates that 

 the disease is not frequent there. We saw no cases of elephantiasis 

 among the Igorots. 



The stained blood smears from 40 adult Igorot laborers were examined 

 for the parasites of malaria, and none were found. Malarial organisms 

 are common in the blood of Filipinos in the lowlands, even when no 

 symptoms of the disease are manifest. ( 9 ) Their absence in the Igorot 

 is in keeping with the observation of Bowman that no patients with 

 malaria were found at Baguio' whose infection could be definitely traced 

 to that locality. ( 7 ) 



DIFFERENTIAL COUNT OF LEUCOCYTES. 



Differential counts of the leucocytes were made in smears from 40 of 

 the men whose stools had been examined and the results of the blood 

 count, correlated with the stool findings, are shown in the following table. 

 Two hundred white cells were counted in each instance. 



