Detecção de genes de virulência e suscetibilidade a antimicrobianos de escherichia coli isoladas de ovos de pata (cairina moschata)

• Autor(a) principal: Almeida, Ana Maria de Souza
• Data de Publicação: 2014
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da UFG
• dARK ID: ark:/38995/001300000f2ff
• Texto Completo: http://repositorio.bc.ufg.br/tede/handle/tede/6393
• topic: Aves aquáticas; Resistência antimicrobiana; Saúde pública; Ovos; Waterfowl; Antimicrobial resistance; Public health; Eggs; MEDICINA VETERINARIA PREVENTIVA::SAUDE ANIMAL (PROGRAMAS SANITARIOS)

Duck is the most important species of waterfowl reared in Brazil, however, there are no studies about the risk of duck eggs in the food chain. The main objective of this study was to outline the main characteristics of waterfowl farms, integrating the risk factors associated with E. coli infection in birds and humans, verify the presence of E.coli in 38 and 25 dozen of duck eggs from markets and subsistence farms in Federal District and Goiás State, determining the pathogenic profile and the antimicrobial resistance profile. Each dozen eggs accounted for three samples: a sample pool of eggshell, pool of albumen and a pool of yolk, totaling samples.The information obtained by questionnaires applied during the visit to the farms revealed no vaccination program, or supply of balanced feed for ducks were employed. Duck were reared with chicken and the contact between the animals occurred since incubation. Through bacteriology, we isolated and identified E.coli in 17.10% (97/567) of samples of duck eggs. In PCR for the detection of the virulence genes papC, tsh, and eae and of the resistance gene iss, of 97 positives samples to E. coli, 35 samples were positive for virulence genes, 31.8% (14/44) came from farms and 39.6% (21/53) from markets. The search of genes in E.coli isolates revealed 15.4% positive to papaC, (15/97) , 21.6% (21/97) positive to tsh, 17.5% (17/97) positive to iss, and 2% (2/97) positive to eae .It conclusion, there are pathogenic strains for both birds and humans, circulating in anseriformes eggs. The investigation of antimicrobial resistance combined with the research of virulence and resistance genes in E. coli isolates obtained from eggs of ducks is an important tool to determine the risk these birds may bring to both poultry health and of public health.