Cytologic detection of Enterobius vermicularis and Strongyloides stercoralis in routine cervicovaginal smears and urocytograms.

Four cases of Enterobius vermicularis infection and one case of Strongyloides stercoralis infection were found during the examination of 22,700 routine Papanicolaou-stained cervicovaginal smears and 434 urinary sediments. Ova of E. vermicularis were observed in the urocytograms from three girls and in the vaginal smear of a young woman. In a second woman, a S. stercoralis larva was detected in the routine vaginal smear. A clear background or a mild inflammatory pattern was noted in the smears in these cases.