•214 



GUERRERO AND SEVILLA. 



iuid 4 with the festi\'0-autuii)nal parasite, as may be seen IVoiii the 



following table : 



Persons int'ecteil— 



Num- 

 ber. 



Variety. 



With 

 splen- 

 omegaly. 



- 



Tertian. 



Quartan. 



iEstivo- 



autum- 



nal. 





15 

 1 



12 





3 



1 



Without fever (latent malaria.) __ 

 Total 









16 



12 





4 



7 





The most frequent type of infection was that of mild tertian fever. 

 All of the patients but one, at the time of the examination, complained 

 of fever, more or less intense. One case had no febrile symptoms and 

 may be considered as a case of latent infection. No cases of quartan 

 infection were found, and no case of marked malarial cachexia. As to 

 the character of the infection, it may be said that excepting in three 

 patients wlio had suffered from relapses the attacks Avere pi'obably all 

 primary. 



For the purpose of determining the number of latent cases of malaria 

 in the town, an investigation of the blood of all cases of splenomegaly 

 encountered was also made. It has been suggested by a number of 

 observers that the amount of malaria in a locality may be roughly judged 

 by observing the percentage of cases of splenomegaly among the people; 

 that is, that the enlargement of the spleen is an index of the amount of 

 malaria present. 



Among 1,131 people, we found only 13, or 1.14 per cent, with an 

 enlarged spleen. However, it must also be taken into account that there 

 are in the Philippines cases of splenomegaly due to other causes than 

 malaria. 



The blood of all those who had an enlarged spleen and came to the 

 clinic for physical examination was subjected to a special investigation, 

 and in only 7 of them was the parasite of malaria encountered; the re- 

 uiaindei' always gave negative results although repeated examinations of 

 the blood were made. The blood of 742 persons was examined for ma- 

 larial ^^arasites, and as has been stated, in only 16, or "^.Ifi per cent, was 

 the presence of the parasite demonstrated. 



Special attention was also devoted to the examination of tbe Ijlood of 

 children, who, according to the researches of Koch, Stephens, Christophers, 

 and Sargent in Africa, James in India, and Craig in the Philippines, 

 seem to suffer more than adults from latent infection. The blood of 278 

 children was examined, of whom only 5, or 1.8 per cent, were found in- 

 fected. The following table will show the relation existing between ma- 

 larial infection and the age of the children, as found in Taytay and at 

 Camp Stotsenberg by Craig. 



