Retrospective Analysis of Persistent Clonal Salmonella enterica Strains of Various Serovars in Commercial Swiss Broiler Farms.

ABSTRACT: Detection of Salmonella Enteritidis (SE) and S. Typhimurium (STm) in broiler holdings is regulated by European and Swiss law to ensure public health. Persistence of Salmonella in broiler houses may jeopardize this goal. The aim of this study was to analyze whether non-SE/STm isolated from boot socks were of clonal origin. Four Salmonella serovars from 11 broiler houses from 10 Swiss farms were selected: S. Infantis, S. Livingston and S. Welikade (meat integration A) and S. enterica subsp. enterica 13,23:i:- (integration B). The genetic relationship was evaluated by whole-genome sequencing (WGS) and core genome multilocus sequence typing (cgMLST)-based tree analysis, with a cluster being defined as < 8 cg alleles differences. The isolates of S. Infantis and S. Livingston, respectively, were

SUBMITTER: Alsaaod M 

PROVIDER: S-EPMC12641197 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature