Trichuris vulpis infection in an Indian tribal population.

Stools from 28 of the 82 inhabitants on remote Little Andaman Island in India were examined for parasite eggs and cysts. Trichuris trichiura eggs were found in 27, Trichuris vulpis eggs in 5, Strongyloides stercoralis larvae in 3, hookworm eggs in 15, Entamoeba histolytica and Entamoeba coli cysts each in 9, Giardia lamblia in 6, Retortamonas sp. in 3, Iodoamoeba sp. in 2, and Chilomastix sp. in 2 stools. Ascaris lumbricoides eggs were not seen. The occurrence of T. vulpis eggs in 5 stools and the absence of A. lumbricoides eggs were considered unusual findings.