Characterization of listeria monocytogenes isolates from cattle and ground beef by pulsed-field gel electrophoresis Caracterización de aislamientos de listeria monocytogenes obtenidos de ganado y de carne molida de vacuno por electroforesis de campo pulsado

Foerster, C; Vidal, L; Troncoso M.; Figueroa G.

Abstract

The aims of this study were to determine the occurrence of Listeria monocytogenes in cattle feces and ground beef, to characterize these strains by pulsed-field gel electrophoresis and to compare them to three listeria strains found in humans. Cattle from different origins (n = 250) and ground beef obtained from supermarkets (n = 40) were sampled. The results show low occurrence in cattle feces (0.4 %) but a higher presence in ground beef (37 %). An important part of the ground beef strains (80 %) had > 95 % similarity with a strain isolated from a human sporadic case and the ATCC 19115 used as control. The strain isolated from cattle feces had 93 % similarity to clone 009, previously associated with a listeriosis outbreak related to cheese. Cattle and ground beef can harbor virulent L. monocytogenes strains. Further studies in animals and animal products are needed to improve listeriosis control.

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Título según SCOPUS: Characterization of listeria monocytogenes isolates from cattle and ground beef by pulsed-field gel electrophoresis [Caracterización de aislamientos de listeria monocytogenes obtenidos de ganado y de carne molida de vacuno por electroforesis de campo pulsado]
Título de la Revista: REVISTA ARGENTINA DE MICROBIOLOGIA
Volumen: 44
Número: 3
Editorial: ASOCIACION ARGENTINA MICROBIOLOGIA
Fecha de publicación: 2012
Página de inicio: 195
Página final: 200
Idioma: English; Spanish
URL: http://www.scopus.com/inward/record.url?eid=2-s2.0-84867684100&partnerID=q2rCbXpz
Notas: SCOPUS