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Marin C, Chinillac MC, Cerdà-Cuéllar M, Montoro-Dasi L, Sevilla-Navarro S, Ayats T, Marco-Jimenez F, Vega S. Contamination of pig carcass with Salmonella enterica serovar Typhimurium monophasic variant 1,4[5],12:i:- originates mainly in live animals. Sci Total Environ 2020; 703:134609. [PMID: 31753504 DOI: 10.1016/j.scitotenv.2019.134609] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Revised: 09/18/2019] [Accepted: 09/21/2019] [Indexed: 06/10/2023]
Abstract
Pork is considered a major source of Salmonella Typhimurium infection in humans in the EU, including monophasic strains (mST). Widespread distribution of virulent serotypes such as monophasic variants of S. Typhimurium have emerged as a public health threat. Despite the current situation, within the EU there is no mandatory programme for the control of Salmonella at pork production level. In this context, the aims of this study were: to examine the presence of Salmonella in the swine production system from arrival at the slaughterhouse until the end of processing, and investigate the genetic relationship among serovars. A total of 21 pig herds were intensively sampled during processing at the slaughterhouse. ERIC-PCR followed by PFGE were performed among isolates recovered at the different steps in the slaughterhouse to assess their genetic relationship. The results showed a high level of Salmonella pork batch contamination upon arrival at the slaughterhouse (71.4%) and at the end of the slaughtering process (66.7%), with mST the main serovar isolated from both origins (53.1% and 38.2%, respectively). Similarly, this study shows that 14.3% of the strains isolated from carcasses have the same Xbal-PFGE profile as those previously recovered in the slaughterhouse environment, but not in the live animals from that same batch. In conclusion, there is a high level of Salmonella swine batch contamination upon arrival at the slaughterhouse and at the end of the slaughtering process, mST being the most frequently isolated serovar. Moreover, a strong genetic relationship has been observed between strains isolated from the batch on arrival at the slaughterhouse, the processing environment and pork carcass contamination. In this sense, it would be necessary to implement a control programme to reduce the bacterium from pork farms and raise the awareness of biosecurity measures.
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Affiliation(s)
- Clara Marin
- Instituto de Ciencias Biomédicas, Departamento de Producción Animal, Sanidad Animal, Salud Pública Veterinaria y Ciencia y Tecnología de los Alimentos, Facultad de Veterinaria, Universidad Cardenal Herrera-CEU, CEU Universities, 46115 Alfara del Patriarca, Valencia, Spain.
| | - Mª Carmen Chinillac
- Instituto de Ciencias Biomédicas, Departamento de Producción Animal, Sanidad Animal, Salud Pública Veterinaria y Ciencia y Tecnología de los Alimentos, Facultad de Veterinaria, Universidad Cardenal Herrera-CEU, CEU Universities, 46115 Alfara del Patriarca, Valencia, Spain
| | - Marta Cerdà-Cuéllar
- Centre de Recerca en Sanitat Animal (CReSA)-Institut de Recerca i Tecnología Agroalimentàries (IRTA), Campus de la Universitat Autònoma de Barcelona, 08193, Bellaterra, Spain
| | - Laura Montoro-Dasi
- Centro de Calidad Avícola y Alimientación Animal de la Comunidad Valenciana, C/Nules, 16, 12539, Alquerias del NP, Castellón, Spain; Instituto de Ciencia y Tecnología Animal, Universitat Politècnica de València, Valencia 46022, Spain
| | - Sandra Sevilla-Navarro
- Instituto de Ciencias Biomédicas, Departamento de Producción Animal, Sanidad Animal, Salud Pública Veterinaria y Ciencia y Tecnología de los Alimentos, Facultad de Veterinaria, Universidad Cardenal Herrera-CEU, CEU Universities, 46115 Alfara del Patriarca, Valencia, Spain; Centro de Calidad Avícola y Alimientación Animal de la Comunidad Valenciana, C/Nules, 16, 12539, Alquerias del NP, Castellón, Spain; Instituto de Ciencia y Tecnología Animal, Universitat Politècnica de València, Valencia 46022, Spain
| | - Teresa Ayats
- Centre de Recerca en Sanitat Animal (CReSA)-Institut de Recerca i Tecnología Agroalimentàries (IRTA), Campus de la Universitat Autònoma de Barcelona, 08193, Bellaterra, Spain
| | - Francisco Marco-Jimenez
- Instituto de Ciencia y Tecnología Animal, Universitat Politècnica de València, Valencia 46022, Spain
| | - Santiago Vega
- Instituto de Ciencias Biomédicas, Departamento de Producción Animal, Sanidad Animal, Salud Pública Veterinaria y Ciencia y Tecnología de los Alimentos, Facultad de Veterinaria, Universidad Cardenal Herrera-CEU, CEU Universities, 46115 Alfara del Patriarca, Valencia, Spain
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