280 NICHOLS. 



According- to I'halcii and Xicliols, who stii(li('(l llic disl ril)Ul ion of 

 lilai-iiisis among liie l'hili|)])iiie scouts, 0.5 per cent of Tagalogs oiilside 

 of Manila are affected. 'Phe iinding during the present survev of one 

 case in a little over 200 adult males confirms flic former figure for 

 this gi'onp, but the percentage M'ould be considerably less if the whoh' 

 po])ulation were considered. Evidently fllariasis with its conse(|uenceS; 

 altliough it is to be found here, if sought for, plays but an insignificant 

 part in the health of the [)eople and does not call for active prophylactic 

 measures. The only (luestion of interest is, why in the presence of 

 occasional cases and the filaria-bearing mosquito, the disease is so rare 

 here and so prevalent elsewhere on the same island. It. is to be noted 

 in this connecticm however, that Cjdc.r fniiyam Wied. is present only in 

 small numbers. 



Mnlarlii. — An examination of the blood of about GOO dispensaiy 

 patients revealed the presence of malarial i)arasites in 19 cases or in 

 3 per cent. The spleen was examined in 233 children at the dispensary, 

 and in 5, or 2.1 per cent, was found to be enlarged. Among 556 adults, 

 enlargement of the spleen occurred eight times, or in l.-t per cent. About 

 5 per cent of all the persons infected with malaria exhibited no symptoms 

 of illness. The disease affected chiefly the adult males and children, very 

 few cases being seen in adult females. Most of the cases gave a history 

 of repeated disability from attacks of fever. 



The tertian parasite was found in 14 cases, the ajstivo-autumnal in 4, 

 and the (juartan in 1. The enlargement of the spleen in all the cases 

 was slight except in one case, a boy of 14 years infected Avith the (|uartan 

 ])arasite, where it was marked. 



The most interesting feature is the distribution of the cases of iualaria 

 along the banks of the streams shown in the map (Plate IV), in which 

 Mr. Banks found Myzomyia rossii breeding. No cases of malaria were 

 found more than two or three blocks away from these streams. In one 

 house, father and son were found with enlarged spleens. The other 

 cases were found isolated and examinations of the blood made of the rest 

 of the family were negative. 



Although 'JViytay is not a highly malarious town, something of a 

 prophylactic nature could be done, in view of the distribution of the 

 cases, bv cleaning the banks of the esteros and by draining the stagnant 

 pools. 



Tul>crciilosi><. — A s])ecial study of tuberculosis was made according to 

 which it was estimated that there were about 60 cases of this disease in 

 the town, or that 1 per cent of the population were affected ; 35 of the 

 cases were adult males over 20 years of age (2 per cent) ; about 15 of the 

 cases were females (1 per cent); and 10 were children (3 per cent). 

 About 800 persons were examined physically and 114 sputum examina- 

 tions made. In 20 cases tul)ercle bacilli were found; 3 children had 



