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Implantation d’une souche de Salmonella Typhimurium et d’une souche de Salmonella Rissen dans un élevage avec de la salmonellose clinique récurrente
Corrégé, Isabelle ; Feurer, Carole
Ifip 2023
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Título:
Implantation d’une souche de Salmonella Typhimurium et d’une souche de Salmonella Rissen dans un élevage avec de la salmonellose clinique récurrente
Autor:
Corrégé, Isabelle
;
Feurer, Carole
Assuntos:
Animal biology
;
Life Sciences
;
Microbiology and Parasitology
;
Veterinary medicine and animal Health
Descrição:
Salmonella is one of the most common bacterial pathogens worldwide in human and animal infections, leading to 52,702 cases of human gastroenteritis in Europe in 2020. Clinical salmonellosis is rare, even though it can occur in pig herds. The aim of this study was to investigate the diversity of Salmonella strains isolated in a farrow-to-finish pig herd suffering from recurrent clinical salmonellosis from 2018-2022. Different areas were sampled, such as farrowing, post-weaning and fattening rooms (with animals or after cleaning and disinfecting), feeding systems, corridors, the entry room, and the loading platform. Only three serotypes were identified: S. Typhimurium, S. Rissen and S. Livingstone. Because S. Livingstone was identified only at the farrowing level, we performed epidemiological monitoring of only S. Typhimurium and S. Rissen. DNA profiles were determined for 37 strains of S. Typhimurium (N= 18) and S. Rissen (N= 19) by pulsotyping. It revealed that the same XbaI DNA profile was identified over the five-year period for each serotype followed. We assumed that both strains have colonized the herd through either live species (sows, rodents, humans) or the farm building, dust or equipment. To our knowledge, this is the first time that a molecular epidemiological investigation of Salmonella strains has been performed in a pig herd suffering from recurrent clinical salmonellosis Les infections à Salmonella sont une des principales causes dezoonoses alimentaires dans les pays industrialisés (Efsa, 2021).Dans les filières porcines européennes le portage asymptomatique avec des sérovars ubiquistes est fréquent même s’il est difficile d’avancer des données précises de prévalence, celle-ci étant liée aux méthodes d’analyses et au plan d’échantillonnage (Corrégé et Minvielle, 2013). Des études épidémiologiques ont montré que dans le cas du portage asymptomatique plusieurs sérotypes peuvent être isolés sur un même animal, une même bande, selon le stade physiologique ou dans le temps (Corrégé et al., 2002). Les salmonelloses cliniques provoquées principalement par Salmonella Typhimurium sont des phénomènes rares et généralement circonscrits dans le temps (Beloeil, 2007). Cependant quelques élevages sont exposés à de la salmonellose clinique récurrente avec atteinte consécutive de plusieurs bandes ou avec apparition régulière d’épisodes cliniques.L’objectif de cette étude était de suivre et d’identifier dans un élevage naisseur-engraisseur atteint de salmonellose clinique récurrente les sérotypes de Salmonella isolés sur les animaux et dans l’environnement des salles d’élevage de 2018 à 2022.
Editor:
Ifip
Data de criação/publicação:
2023
Idioma:
Francês
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