Prevalence of Listeria monocytogenes in pork-meat and other processed products from the Colombian swine industry
Journal Title: Revista MVZ Cordoba - Year 2012, Vol 17, Issue 1
Abstract
Objective. To determine the prevalence of L. monocytogenes in pork carcasses, meat cuts, and meat products (“chorizo”, sausage and ham). Materials and methods. Stratified sampling was implemented in meat-processed products. We analyzed 566 (37%) carcasses, 472 (31%) meat cuts, and 481, (32%) meat-processed products, distributed as follows: 169 (11%) sausage, 163 (11%) ham, and 149 (10%) “chorizo”, for a total of 1519 (100%) samples in a period of 18 months. The samples were processed using the ISO-17604, ISO-11290-1 and the USDA/FSIS (MLG-8.03) methods. Genus and species were confirmed by multiplex-PCR. Results. We obtained isolates of L. monocytogenes from 21 carcasses (10%), 160 (76%) from meat deboning, 10 (5%) from ham, 6 (3%) from “chorizo”, and 13 (6%) from sausage. The prevalence found was 3.7% and 33.9% in carcasses and meat deboning respectively. The prevalence in the meat-processed products was 4.03% in “chorizo”, 6.13% in ham and 7.69% in sausage. The overall prevalence of L. monocytogenes in the study was 13.82%. Conclusions. We found L. monocytogenes in different products analyzed, with particular interest in ham and sausage since both are consumed without previous heat treatment.
Authors and Affiliations
Andrea Gamboa-Marín, M. Sc| Laboratorio de Microbiología de Alimentos., Sonia Buitrago M, Microbiol| Laboratorio de Microbiología de Alimentos., Karol Pérez-Pérez, Bact| Laboratorio de Microbiología de Alimentos., Marcela Mercado R, M. Epidemiol| Laboratorio de Biotecnología Molecular. Grupo de Biotecnología Ambiental e Industrial (GBAI)., Raúl Poutou-Piñales, Ph. D| Grupo de Enfermedades Infecciosas. Bogotá, D.C. Colombia., Ana Carrascal-Camacho, M. Sc *| Laboratorio de Microbiología de Alimentos.Correspondencia: acarrasc@javeriana.edu.co
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