Condições higiênico-sanitárias, qualidade microbiológica e teste de susceptibilidade antimicrobiana de cepas isoladas de sanduíches comercializados por ambulantes

Abstract

The hygienic-sanitary and microbiological qualities of sandwiches sold by street-vendors in Londrina-PR were assessed, and the antimicrobial susceptibility testing was carried out on isolated bacteria. Sanitary conditions were evaluated in 47 street-vending places, and 20 samples were randomly collected for analyzing the contamination with Aerobic mesophilic bacteria, Staphylococcus aureus, total coliforms and coliforms at 45ºC, and Salmonella. The isolated microorganisms were identified and their sensitivity to antibiotics was evaluated. The sanitary conditions were inadequate in 79.2% of the evaluated items. All sandwiches (100%) were contaminated with mesophilic bacteria, coliforms at 35ºC and fecal coliform, and 45% with E. coli. S. aureus was found in 55% of samples, and in 25% these values were higher than those allowed by legislation. No Salmonella sp was isolated from any of the tested samples. The hygiene practices of many food street-vending places are not adequate, resulting in a high proportion of read-to-eat foods with microbiological quality unsatisfactory for consumption.