Genes associated with pathogenicity of avian Escherichia coli (APEC) isolated from respiratory cases of poultry

Pesquisa Veterinária Brasileira

Ana C.g.p. Rocha²  Silvio L.s. Rocha¹  Carlos A.v. Lima-rosa¹  Guilherme F. Souza¹  Hamilton L.s. Moraes¹  Felipe O. Salle¹  Lucas B. Moraes¹  Carlos T.p. Salle¹ 

[1] ,Ministério da Agricultura, Pecuária e Abastecimento Secretaria de Defesa Agropecuária Brasília DF ,Brazil

关键词: Escherichia coli;    virulence;    PCR;    poultry;    pathogenicity;    Escherichia coli;    virulência;    PCR;    patogenicidade;    frango de corte;   

DOI  :  10.1590/S0100-736X2008000300009

来源: SciELO

【 摘 要 】

The virulence mechanisms of avian pathogenic Escherichia coli (APEC) have been continually studied and are believed to be multi-factorial. Certain properties are primarily associated with virulent samples and have been identified in avian isolates. In this study a total of 61 E. coli, isolates from chicken flocks with respiratory symptomatology, were probed by Polimerase Chain Reation (PCR) for the presence of genes responsible for the adhesion capacity, P fimbria (papC) e F11 fimbria (felA), colicin production (cvaC), aerobactin presence (iutA), serum resistance (iss), temperature-sensitive hemagglutinin (tsh), and presence of K1 and K5 capsular antigens (kpsII). The iss gene was detected in 73,8%, tsh in 55,7%, iutA in 45,9%, felA in 39,3%, papC in 24,3%, cvaC in 23% and kpsII in18%.

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