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Further Observation on the Incidence of Hepaticola (Capillaria) Hepatica Ova in Human Feces

During the months of June, July, and August, 1937, 517 persons in six Chagres River villages in Panama were examined for intestinal parasites. Four hundred and seventy-eight, or 92.4 per cent, were found to harbor one or more parasites. The region in which these villages are located is designated as unsanitated in contradistinction to the completely sanitated Canal Zone. The inhabitants are chiefly negroid stock, descendants of Jamaicans brought to Panama during the construction days.

The term parasite as used here refers to the organisms listed below only, and in percentage incidence as follows:

per cent

Endamoeba histolytica 32.4

Hookworm 52.0

Ascaris 46.7

Trichuris trichiura 30.3

Strongyloides 34.2

Two cases of Balantidium coli infestation were encountered.

In one village, New San Juan, 194 persons were examined. In this group, ova of Hepaticola hepatica were found in sixteen. The ova were plentiful and easily found in the initial search of an unconcentrated saline preparation.