Resistencia a antimicrobianos em cepas de Salmonella spp, Escherichia coli e Enterococcus spp isoladas de carcaças de frango

AUTOR(ES)
DATA DE PUBLICAÇÃO

2004

RESUMO

Chicken carcasses can act as a vehicle for pathogenic bacteria to human being, particularly for salmonellas. Food poisoning in humans from this source has become more frequent, the seriousness being directly related to the drug resistance profile of the organisms. The indiscriminate use of antibiotics in poultry therapeutics and in poultry feed as growth promoters has been indicated as the cause of multi-resistance to pathogens and led to the selection of resistant bacteria within the ecosystem. The resistance profile of bacteria present in the digestive tract of poultry, such as Escherichia coli and Enterococcus spp, may be an indicator of the use of such drugs. Throughout the world proposals have been made to restrict the use of drugs in poultry, as a means of reducing the problems of anti-microbial resistance. The objective of this research was to isolate and characterize strains of Salmonella spp., Enterococcus spp and Escherichia coli from chicken carcasses from different suppliers in different Brazilian states. After this step, the anti-microbial resistance to drugs commonly used in animais for both therapeutic and growth promoter purposes, was determined. Of the 100 chicken carcasses analyzed, 24% were contaminated with Salmonella spp, 89% were contaminated with Escherichia coli and 84% were contaminated with Enterococcus spp. The confirmed cultures of the microorganisms described were submitted to a resistance test for 17 anti-microbial agents. The used anti-microbial agents were amicacin 30 mcg, netilmicin 30 mcg, ciprofloxacin 5 mcg, chloranphenicol 30 mcg, ampicilin 10 mcg, aztreonam 30 mcg, gentamicin 10 mcg, tetracyclin 30 mcg, polimixicin B 300 U.I., sulphazothrim 25 mcg, nalidixic acid 30 mcg, tobramicin 10 mcg, nitrofurazon 50 mcg, bacitracin 0,04 U.I., enrofloxacin, cephoxitin (30 mcg) e cephalotin (30 mcg). The resistance rates were 75,6%, 29,7% e 20,3%, respectively for Enterococcus spp., E. coli and Salmonella spp Newport (24,9%) was the most resistant Salmonella sorotype. The test showed a high rate of resistance to the drugs by the bacteria examined, both for those used in humans and those used for veterinary purposes and to those used in feeds to promote growth

ASSUNTO(S)

escherichia coli salmonella frango de corte

ACESSO AO ARTIGO

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