Caracterização clonal e biologica de linhagens de Escherichia coli de origem aviaria / Clonal and biological characterization of avian Escherichia coli

AUTOR(ES)
DATA DE PUBLICAÇÃO

2006

RESUMO

Forty and nine Escherichía coli strains isolated frem sick chickens (24 frem septicaemia - S, 14 frem swollen head syndrem - SHS, and 11 frem omphalitis - O), and 30 strains isolated frem the cloacae region (C) of healthy chickens were analyzed in relation of the presence of virulence-related genes, E. colí phylogenetical groups, fliC gene similarity. These data were compared to a ERIC-PCR study realized of the same strains (Silveira et a/.,2002b) to characterize possible pathogenic clones present in this population. The results demonstrated that the virulence genes were more frequent among E. colí strains isolated from sick chicken. Strains isolated frem healthy chicken, frem omphalitis and from septicemic chickens were derived frem E. colí non pathogenic greups (A and B 1). SHS and septicemic strains belonged to E. coli pathogenic greups (B2 and D). The comparison of these data with the ERIC-PCR study demonstrated that these strains compounded three main clusters: (i) one non pathogenic, comp

ASSUNTO(S)

escherichia coli pathogenicity molecular cloning virulence factors ave domestica clonagem molecular poultry patogenicidade

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