ArticleCurrent microbiology2025
Unveiling the Genomic Landscape of Understudied Salmonella enterica Serovars from Poultry and Human: Implications for Food Safety.
Article in Current microbiology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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9 authors.
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Abstract
Despite the bacteria of the genus Salmonella are pathogens of zoonotic importance, the factors associated with some serovars genetic diversity remain unclear. We investigated genotypic profiles of antimicrobial resistance, plasmid replicons, and virulence factors in 301 S. enterica genomes from human and animal sources, supplemented by ten sequenced genomes from fecal samples of laying hens in Brazil. Many antimicrobial resistance genes have been detected across various Salmonella serovars; with a limited number of unique resistance genes predicted in poultry isolates compared to human isolates. Specifically, among the 52 antimicrobial resistance genes identified, 48% were shared between poultry and human isolates, while 21.1% were exclusive to poultry isolates and 30.7% were exclusive to human isolates. Chromosomal mutations in the gyrA and parC genes were also predicted. To the best of our knowledge, this is the first work to report S. Braenderup carrying the SPI-10. SGI-1 was detected in a few isolates of S. Schwarzengrund from poultry and the CS54 island was solely noticed in genomes referring to the serovars S. Saintpaul and S. Braenderup. Among the serovars analyzed, S. Saintpaul showed the lowest plasmid diversity. A total of 161 (161/271) virulence genes were common to all serovars, the remaining genes were exclusively identified within specific serovars, revealing a distinct distribution pattern within the S. enterica population. Overall, our study brings to light the genetic potential of Salmonella serovars frequently neglected in poultry production, which threatens public health, particularly due to multidrug-resistant profiles against active principles used to treat human infections.
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