Malarial Endemicity Research Articles

On the occurrence of Anopheles (Myzomyia) Listoni in Calcutta

Stephens and Christophers, in their original report to the Royal Society, on the Relation of Malarial Endemicity to Species of Anopheles , state, as their second conclusion, "that the distribution of A. Christophersi [= Myzomyia Listoni ] corresponds closely with an area of extremely high endemicity." It will be remembered that they were discussing the relation of malarial endemia to species of Anopheles in Bengal; that they found this endemia to vary from 0 in Calcutta to 7 in Barrackpore, 12 in Jalpaigori, and 72 in the Duars (increasing as they proceeded north); and that they concluded "that the distribution of certain species coincided with areas of high endemicity, while other species occurred, and even existed in profusion, where very little infection was present."