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Inicio > Vol. 11, Núm. 4 (2020) > Reyes-Rodriguez

Serotypes and Stx2 subtyping of Shiga toxin producing Escherichia coli isolates from cattle carcasses and feces

Nydia Edith Reyes-Rodriguez, Jeannette Barba-León, Armando Navarro-Ocaña, Vicente Vega-Sanchez, Fabian Ricardo Gómez De Anda, Juan Martin Talavera-Gonzalez, Martin Talavera-Rojas

Resumen


Shiga toxin E. coli (STEC) is an important pathogen responsible for foodborne illness, this have been related with epidemic outbreaks in the past, mainly because of consumption of bovine meat. The objective of this study was identify the serotypes and Stx2 subtypes and associate them with their possible epidemiology. There were analyzed a total of 65 isolates from the collection of the Centro de Investigación y Estudios Avanzados en Salud Animal, Facultad de Medicina Veterinaria y Zootecnia of the Universidad Autónoma del Estado de México, from carcasses and feces of bovines at three different Municipal slaughterhouses. The identification of Stx2 gene by PCR at final point, sequencing and analyzed with the help of BLAST software. There were found O157:H7, O70:H16, O91:H10, O112ac:H2, O128ac:H26 serotypes, which have been reported to be present at infectious outbreaks previously by foodborne worldwide; 63.07% (41/65) of the Escherichia coli strains got amplified for Stx2 and after BLAS analysis it was confirmed its presence and a hypothetic protein. The presence of this serotypes in combination with different subtype’s, Stx2a, Stx2c, Stx2d, in carcasses and feces of bovine in must be considered as a potential risk for diseases an important problem of the public health.

Palabras clave


Cattle carcasses; Escherichia coli; Serotyping; stx2

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Referencias


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DOI: https://doi.org/10.22319/rmcp.v11i4.5049

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