[Intestinal parasites and ectoparasites in the V region, Chile: study in the Psychiatric Hospital of Putaendo].

: A prospective study was carried out in 229 chronic patients (of both sexes) from the Psychiatric Hospital of Putaendo, in order to find out the frequency of intestinal parasites and/or commensals in the period 1987-1989. One hundred and ninety four (84.7%) out of the 229 studied patients were infected by parasites and/or commensals. The high prevalence of commensals Entamoeba coli (55.0%) and Endolimax nana (50.5%) became more evident. Among the parasites, the most frequent was Trichuris trichiura (41.5%). The presence of Pediculus humanus capitis and lesions suggestive of those produced by Sarcoptes scabiei were detected in 7.2 and 0.6 of the examined patients. The results obtained show the high frequency of intestinal infections by parasites and commensals in the patients of the studied hospital.