Virulence factors of Escherichia coli isolated from calves with diarrhea in Brazil
Regina Salvadori, Márcia; Freesz Valadares, Geórgio; da Silva Leite, Domingos; Blanco, Jesús; Yano, Tomomasa.
Braz. J. Microbiol.
; 34(3)2003.
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en Inglés
| VETINDEX | ID: vti-443723
Two hundred and five Escherichia coli strains isolated from calves with diarrhea from mid-western Brazil were screened for the presence of virulence factors associated with bovine colibacillosis. One hundred and two (49.8%) of the E. coli strains produced toxins Shiga toxins 1 (9.7%) and 2 (6.3%), a-hemolysin (9.7%), enterohemolysin(6.8%), Cytotoxic Necrotizing Factors type 1 (0.5%), and type 2 (4.4%), enterotoxins LT-II (8.3%) and STa (3.9%). No strain produced enterotoxin LT-I. Fimbrial adhesins F5 and F17 were produced by 7.3% and 4.8% of the strains, respectivly, and none expressed F41. Seven strains (3.4%) possessed the gene eae and belonged to serotypes O26H-; O111H- and O118H16. These results suggest that calves in Brazil may be an important source of pathogenic E. coli for animals and humans.
Biblioteca responsable:
BR68.1
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