Abstract

A retrospective study was performed in stool samples examined by Burrows method and Graham technique applid to 212 persons from Illapel,Chile ,during 1995. Infection by parasites and /or commensals was demostrated in 280(39.4%)stool samples. More positive stool sample was found in rural patient(54%) versus 36,9%. Two third part of stool was infected by one specie. The most frequent agent was Blastocystis hominis (184%), followed by Enterobius vermicularis (15.4%) Endolimax nana (10.5%) and finally Entamoeba coli (28.4%).