. A practical study of malaria. Fig. 6.—Spleen rate in British Central Africa (after Daniels). only one really accurate method by which we can determinethe degree of malaria in a given locality, and that is by ascer-taining the average time in which a newcomer becomes in-fected. The shorter this period the greater, evidently, the. Fig. 5.—This group shows a high Index endemicus. ETIOLOGY 57 malaria potential of the locality. Native children constitute theclass of newcomers most accessible for making the estimate. The most accurate method of determining the index en-demicus of an area is to mak
. A practical study of malaria. Fig. 6.—Spleen rate in British Central Africa (after Daniels). only one really accurate method by which we can determinethe degree of malaria in a given locality, and that is by ascer-taining the average time in which a newcomer becomes in-fected. The shorter this period the greater, evidently, the. Fig. 5.—This group shows a high Index endemicus. ETIOLOGY 57 malaria potential of the locality. Native children constitute theclass of newcomers most accessible for making the estimate. The most accurate method of determining the index en-demicus of an area is to make a large number of bloodexaminations of native children at various ages. This requiresa great deal of time. It has been repeatedly shown that inregions where malaria prevails extensively a large per young children harbor the parasites without manifestingany symptoms of the disease, the index decreasing as theage increases. For this reason young natives with latentmalaria are the source of the greatest danger to the com-munity. Koch78 records the following indices: At Bogadjim: Per Cent. Infected. Children under two years Children from two to five years Persons over five years At BongU : Per Cent. Infected. Children under two years Children from two to five years Children from five to ten yea
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectmalaria, bookyear1909
