Lambs are an important source of atypical enteropathogenic Escherichia coli in southern Brazil
| Autor: | Ghizlane Dahbi, Waldir P. Elias, Jacinta Sanchez Pelayo, Azucena Mora, Beatriz E. C. Guth, Fernando H. Martins, Miguel Blanco, Juan Marzoa, Roxane M. F. Piazza, Jorge Blanco, Sylvia Cardoso Leão |
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| Rok vydání: | 2016 |
| Předmět: |
0301 basic medicine
Serotype Disease reservoir Meat 030106 microbiology Virulence Food Contamination Biology medicine.disease_cause Microbiology Enteropathogenic Escherichia coli Feces 03 medical and health sciences medicine Animals Humans Escherichia coli Escherichia coli Infections Disease Reservoirs Intimin Sheep General Veterinary Genetic Variation General Medicine Virology 030104 developmental biology Flock Brazil |
| Zdroj: | Veterinary Microbiology. 196:72-77 |
| ISSN: | 0378-1135 |
| Popis: | Food-producing animals can harbor Escherichia coli strains with potential to cause diseases in humans. In this study, the presence of enteropathogenic E. coli (EPEC) was investigated in fecal samples from 130 healthy sheep (92 lambs and 38 adults) raised for meat in southern Brazil. EPEC was detected in 19.2% of the sheep examined, but only lambs were found to be positive. A total of 25 isolates was characterized and designated atypical EPEC (aEPEC) as tested negative for bfpA gene and BFP production. The presence of virulence markers linked to human disease as ehxA, paa, and lpfAO113 was observed in 60%, 24%, and 88% of the isolates, respectively. Of the 11 serotypes identified, eight were described among human pathogenic strains, while three (O1:H8, O11:H21 and O125:H19) were not previously detected in aEPEC. Associations between intimin subtypes and phylogroups were observed, including eae-θ2/A, eae-β1/B1, eae-α2/B2 and eae-γ1/D. Although PFGE typing of 16 aEPEC isolates resulted in 14 unique pulsetypes suggesting a genetic diversity, specific clones were found to be distributed in some flocks. In conclusion, potentially pathogenic aEPEC strains are present in sheep raised for meat, particularly in lambs, which can better contribute to dissemination of these bacteria than adult animals. |
| Databáze: | OpenAIRE |
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