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The city of Sao Luis, capital of Maranhao state (Brazil), provides ineffective treatment of its effluents, which are released straight into the water resources. In order to search for indicators of fecal contamination at the coastal environment we collected samples from different sites. Samples from Ponta d’Areia, Sao Marcos, Calhau and Olho d’Agua beaches were analyzed aiming to detect pathogens and diarrheagenic strains of Escherichia coli; in addition to test the susceptibility of diarrheagenic E. coli strains to sanitizer agents. In all analyzed areas, species of E. coli, Serratia liquefaciens, Hafnia alvei, Salmonella spp., and Serratia sp were identified. Strains of diarrheagenic E. coli were identified thorough the Polymerase Chain Reaction (PCR), 82% corresponded to enterotoxigenic E. coli (ETEC), 9% to enterohaemorrhagic E. coli (EHEC) and 9% to enteroaggregative E. coli (EAEC). The sanitizers tested were detergent, domestic alcohol and sodium hypochlorite, the latter presented higher bactericidal effect for all E. coli strains. The study showed that the local sanitation problems contributed to the contamination of the beaches in Sao Luis by microorganisms resistant to sanitizers which pose risks to public health.

revista de patologia tropical / journal of tropical pathology

DETECÇÃO DE ENTEROPATÓGENOS E TESTE DE SUSCEPTIBILIDADE A AGENTES SANITIZANTES DE CEPAS DIARREIOGÊNICAS DE Escherichia coli ISOLADAS DAS PRAIAS DE SÃO LUÍS - MARANHÃO