Primer reporte de la prevalencia de Escherichia coli productora de toxina Shiga en carne molida en Quindío, Colombia
Resumen
Introducción. Escherichia coli productora de toxina Shiga (STEC) es un agente patógeno de origen alimentario asociado a casos clínicos de diarrea en humanos; sus principales factores de virulencia son las toxinas Shiga (Stx1 y Stx2). El principal reservorio de STEC es el ganado bovino y muchos brotes en humanos se han relacionado con el consumo de carne mal cocida contaminada con este agente patógeno.
Objetivo. El objetivo de este trabajo fue determinar la prevalencia de STEC en carne molida comercializada en todas las carnicerías de un municipio del departamento del Quindío y caracterizar los genes de virulencia de las cepas encontradas.
Materiales y métodos. Se tomaron 30 muestras de carne molida en tres momentos diferentes; se detectaron los genes stx y otros factores de virulencia de STEC (eae, ehxA, saa) mediante PCR Multiplex.
Resultados. Los resultados mostraron una prevalencia global de STEC del 33,33 % (10/30 muestras positivas). En total se aislaron ocho cepas STEC no-O157 (LEE-negativas) con cuatro perfiles genéticos diferentes: stx2 / stx2-ehxA-saa / stx1-stx2-ehxA-saa / stx1-saa.
Conclusión. Este es el primer reporte que muestra la prevalencia de STEC en carne molida en un municipio del departamento del Quindío.
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