Serotypes and antibiotic resistance of verotoxigenic (VTEC) and necrotizing (NTEC) Escherichia coli strains isolated from calves with diarrhoea.

FEMS Microbiology Letters
E A González, J Blanco

Abstract

Serotypes and antibiotic resistance of 51 Verotoxigenic (VTEC) and 33 Necrotizing (NTEC) bovine Escherichia coli strains were determined and compared with those shown by 205 non-VTEC non-NTEC strains isolated from the same batch of calves. E. coli untypable for O-antigen represented 47% of the VTEC, 12% of the NTEC and 8.8% of the non-VTEC non-NTEC. Typable VTEC belonged to serotypes 02:K?, 0103:K-, 0104:K?, 0128:K?, 0153:K- and O157:K-:H7, whereas typable NTEC were of serotypes 08:K87, 015:K14, 015:K-, 054:K?, 076:K-, 078:K(80), 088:K?, 0123:K-, 0139:K- and 0153:K-. Non-VTEC non-NTEC showed a wide variety of serotypes which were generally unrelated to those found in VTEC and NTEC. VTEC were resistant to antibiotics at higher rates than NTEC and non-VTEC non-NTEC, and showed also the highest multidrug-resistant pattern. Our results show that bovine VTEC strains belonged to O-groups usually found in human VTEC causing sporadic diarrhoea, haemorrhagic colitis and/or haemolytic uraemic syndrome, such as 02, 0103, 0104, 0153 and especially 0128 and O157. In contrast, bovine NTEC strains belonged to serotypes different from those previously found in necrotizing E. coli strains of human origin.

References

Dec 1, 1977·Infection and Immunity·J KonowalchukS Stavric
Jun 1, 1988·Journal of Medical Microbiology·H R Smith, S M Scotland
Oct 1, 1987·Applied and Environmental Microbiology·M P Doyle, J L Schoeni
Feb 23, 1985·The Veterinary Record·D SherwoodA D O'Brien

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Citations

Jan 1, 1996·Veterinary Microbiology·J I GarabalJ E Blanco
Oct 31, 2006·Environmental Monitoring and Assessment·Tao Yan, Michael J Sadowsky
Nov 7, 2006·Journal of Animal Science·C L Gyles
Nov 27, 2002·Applied and Environmental Microbiology·Troy M ScottJerzy Lukasik
Oct 1, 1990·Clinical Microbiology Reviews·R E Holland

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