Contribution to the problem of the so-called nonpathogenic amoebae in the intestine of man.
Among 10,418 patients of a Prague hospital, a plain infection with intestinal parasitic protozoans was identified in 1,319 persons (12.7%). Of these, 3.5% were  infested with Giardia intestinalis, 0.3% with Entamoeba histolytica forma minuta, 5.7% with Endolimax nana. We evaluated the frequency of findings of protozoans in various clinical diagnoses. A statistically significant increase in frequency was recorded for E. nana in diagnoses of eosinophilia, giardiasis, amoebiasis and helminthiasis. A slight increase above the average was found for Entamoeba coli in diagnoses of giardiasis and helminthiasis. Most cases of infection with Entamoeba histolytica were associated with a stay abroad. No increase in the frequency of these protozoans was recorded for patients with diarrhea. An analysis of the results indicated that a nonpathogenic amoeba might participate in the origin of intestinal disorders in man.
D000328:Adult; D000562:Amebiasis / Q000453:epidemiology; D003604:Czechoslovakia; D004709:Endolimax / Q000472:pathogenicity; D004748:Entamoeba histolytica / Q000472:pathogenicity; D004749:Entamoebiasis / Q000453:epidemiology; D005872:Giardia / Q000472:pathogenicity; D005873:Giardiasis / Q000453:epidemiology; D006801:Humans; D008297:Male; D008875:Middle Aged; D011528:Protozoan Infections / Q000453:epidemiology*