Summary
Bacteriological and Parasitological studies were carried out in the faces of 110 diarrhoeal children 0-10 years old In two hospitals In Tucuruí, Estate of Pará, Brazil. The samples were examined before any medical treatment. In 51 cases (46,3%) Bacteria and/or Parasites were identified, being 17 cases (15,4%) bacterias, 28 cases (25,4%) intestinal parasites and 6 cases (5,4%) mixed Bacteria and Parasites. In 23 samples (20,9%) Bacterial pathogens were isolated: 21 pathogenic Escherichia coli serogroup, 1 Shigella sonnei and 1 Shigella flexneri. Eight different E. coli serogroups were identified. The most frequent serogroup were firstly 026:K60 and secondly 086a:K61. All pathogenic strains except E. coli 0119:K69 showed multiple resistance to 12 antimicrobial drugs. The intestinal parasites identified were: Giardia lamblia 15,4%, Ascaris lumbricoides 10,0%, Entamoeba histolytica 6,3%, Strongyloides stercoralis 4,5%, Trichocephalus trichiurus 2,7%, Ancilostoma sp. 1,8%, Taenia sp. 0,5%, Balantidium coli 0,9% and Himenolepis nana 0,9%.