Prevalence of Entamoeba histolytica in patients with schistosomal colonic polyposis.
Two hundred and fifty-seven Egyptian patients were classified into three groups: patients with schistosomal colonic polyposis, those with simple schistosomiasis without polyposis, and a non-schistosomal group. A diagnosis of schistosomiasis was made by clinical history and examination plus three fresh stool examinations or a rectal biopsy. The presence of schistosomal colonic polyps was established by sigmoidoscopy and biopsy of polyps. Stool examinations were made on all individuals, using the merthiolate-iodine-formaldehyde technique to detect Entamoeba histolytica. We found the prevalence of amebiasis in the group with schistosomal colonic polyposis (37%) to be significantly higher than that in the non-schistosomal group (11%) and in the schistosomal group without polyposis (15%). The difference in prevalence of amebiasis between the simple schistosomal and non-schistosomal groups was not significant.
D000293:Adolescent; D000328:Adult; D003106:Colon / Q000469:parasitology / Q000473:pathology; D003110:Colonic Neoplasms / Q000209:etiology*; D004404:Dysentery, Amebic / Q000150:complications*; D004534:Egypt; D004748:Entamoeba histolytica; D005260:Female; D006801:Humans; D007417:Intestinal Polyps / Q000209:etiology*; D008297:Male; D008875:Middle Aged; D012550:Schistosoma mansoni; D012552:Schistosomiasis / Q000150:complications*; D012812:Sigmoidoscopy