期刊
FRONTIERS IN MICROBIOLOGY
卷 13, 期 -, 页码 -出版社
FRONTIERS MEDIA SA
DOI: 10.3389/fmicb.2022.961739
关键词
whole-genome sequencing; multidrug resistance; phylogenomic; Salmonella Kentucky; Salmonella London; food safety
类别
资金
- Wenzhou Science Research Projects
- [Y20180202]
Increasing human salmonellosis caused by Salmonella enterica serovar Kentucky and London has raised concerns. This study examined the genetic traits and antimicrobial resistance of these serovars in Zhejiang Province, China. The findings revealed diversity in host range and disease-causing potential, as well as similarities between food and clinical isolates. Additionally, high-level dual resistance to ciprofloxacin and cephalosporins in S. Kentucky ST198 isolates highlights the evolving threat of antibiotic resistance.
Increasing human salmonellosis caused by Salmonella enterica serovar Kentucky and London has raised serious concerns. To better understand possible health risks, insights were provided into specific genetic traits and antimicrobial resistance of 88 representative isolates from human and food sources in Zhejiang Province, China, during 2016-2021. Phylogenomic analysis revealed consistent clustering of isolates into the respective serovar or sequence types, and identified plausible interhost transmission via distinct routes. Each serovar exhibited remarkable diversity in host range and disease-causing potential by cgMLST analyses, and approximately half (48.6%, 17/35) of the food isolates were phylogenetically indistinguishable to those of clinical isolates in the same region. S. London and S. Kentucky harbored serovar-specific virulence genes contributing to their functions in pathogenesis. The overall resistance genotypes correlated with 97.7% sensitivity and 60.2% specificity to the identified phenotypes. Resistance to ciprofloxacin, cefazolin, tetracycline, ampicillin, azithromycin, chloramphenicol, as well as multidrug resistance, was common. High-level dual resistance to ciprofloxacin and cephalosporins in S. Kentucky ST198 isolates highlights evolving threats of antibiotic resistance. These findings underscored the necessity for the development of effective strategies to mitigate the risk of food contamination by Salmonella host-restricted serovars.
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