Ancylostoma Ceylanicum: a Parasite of Man in Calcutta and Environs *

Abstract
Sixteen of 183 persons (8.7%) of a predominantly rural sample population (175 from a village 40 miles north of Calcutta and 8 from the city) harbored Ancylostoma ceylanicum. In all but one instance this species occurred concurrently with both Necator americanus and A. duodenale; in the remaining case it was recovered with the latter only. A. ceylanicum constituted 0.1% of all the hookworms recovered, and even in the 16 persons infected with this species it accounted for only 1.3% of the worms. In only one of these infections were both sexes represented.

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