Molecular characterization of virulence factors in Escherichia coli strains isolated from parrots with colibacilosis
DOI:
https://doi.org/10.11606/S1413-95962008000700007Keywords:
Parrots, Escherichia coli, Virulence factors, APEC, ColibacilosisAbstract
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.Downloads
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Published
2008-12-01
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How to Cite
1.
Knöbl T, Godoy SN, Matushima ER, Guimarães MB, Ferreira AJP. Molecular characterization of virulence factors in Escherichia coli strains isolated from parrots with colibacilosis. Braz. J. Vet. Res. Anim. Sci. [Internet]. 2008 Dec. 1 [cited 2024 Apr. 27];45(supl.):54-60. Available from: https://revistas.usp.br/bjvras/article/view/26729