Molecular characterization of virulence factors in Escherichia coli strains isolated from parrots with colibacilosis

Authors

  • Terezinha Knöbl Centro Universitário das Faculdades Metropolitanas Unidas, Faculdade de Medicina Veterinária, São Paulo, SP
  • Silvia Nery Godoy Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Patologia, São Paulo, SP
  • Eliana Reiko Matushima Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Patologia, São Paulo, SP
  • Marta Brito Guimarães Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Patologia, São Paulo, SP
  • Antonio José Piantino Ferreira Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Patologia, São Paulo, SP

DOI:

https://doi.org/10.11606/S1413-95962008000700007

Keywords:

Parrots, Escherichia coli, Virulence factors, APEC, Colibacilosis

Abstract

A total of eight Escherichia. coli isolates from psittacine birds were serogrouping and investigated for the virulence factors: pili associated with pyelonephritis (pap), S fimbriae (sfa), afimbrial adhesin (afa), capsule K1 (neu), curli fibers (crl, csgA), temperature-sensitive hemagglutinin (tsh), heat labile (LT) and heat stable (STa and STb) enterotoxins, Shiga-like toxins (Stx1 and Stx2), Cytotoxic necrotizing factor (cnf1), haemolysin (hly), aerobactin production (iuc) and serum resistance (iss). The results showed that the isolates belonged to six serogroups: O23; O54; O64; O76; O128 and O152. The found virulence genes were: crl+ in all isolates, pap+, iuc+ and iss+ in three isolates; tsh+ in two isolates. All strains were negative for genes neu, csgA, sfa, afa, hly, cnf and LT, STa, STb, Stx1, Stx2 toxins. Our findings suggested that some E. coli isolated from psittacine birds present some virulence factors of avian pathogenic E. coli (APEC) pathotype.

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Published

2008-12-01

How to Cite

Knöbl, T., Godoy, S. N., Matushima, E. R., Guimarães, M. B., & Ferreira, A. J. P. (2008). Molecular characterization of virulence factors in Escherichia coli strains isolated from parrots with colibacilosis. Brazilian Journal of Veterinary Research and Animal Science, 45(supl.), 54-60. https://doi.org/10.11606/S1413-95962008000700007

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