文献类型：期刊文献

英文题名：Comparative genomics analysis of Salmonella Enteritidis isolated from clinical cases associated with chicken

作者：Bu, Xiangfeng[1];Wu, Yufan[2];Hong, Yi[1];Shi, Juping[3];Shao, Jingdong[4];Jia, Kai[1];Dong, Qingli[1];Wang, Xiang[1]

机构：[1]Univ Shanghai Sci & Technol, Sch Hlth Sci & Engn, Shanghai 200093, Peoples R China;[2]East China Univ Sci & Technol, Ctr Anal & Test, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China;[3]Zhangjiagang Ctr Dis Control & Prevent, Suzhou 215600, Peoples R China;[4]Technol Ctr Zhangjiagang Customs, Suzhou 215611, Peoples R China

年份：2024

卷号：24

期号：1

外文期刊名：BMC MICROBIOLOGY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001363949300003)】；

基金：This study was funded by the Shanghai Agriculture Applied Technology Development Program (2022-02-08-00-12-F01144) and Suzhou Science and Education Project for Youth (KJXW2023066)

语种：英文

外文关键词：Antibiotic resistance; Mobile genetic elements; Multidrug-resistant; Phylogenetic analysis; Virulence factors; Whole-genome sequencing

摘要：Salmonella Enteritidis is a major foodborne pathogen, and the emergence of multidrug-resistant (MDR) S. Enteritidis poses a serious public health challenge. In this study, we report the genomic characterization of five S. Enteritidis isolates from clinical. These isolates exhibited resistance to seven classes of antimicrobials with four of the five characterized as MDR. Isolate 33 A exhibited resistance to colistin and polymyxin B, while no associated antimicrobial resistance genes (ARGs) were identified in its genome. Isolate 21 A and 44 A were extended-spectrum beta-lactamases-producing (ESBLs). Whole genome sequencing analysis revealed the presence of multiple mobile genetic elements (MGEs), including plasmids, prophages, and genomic islands, which may have facilitated the acquisition and dissemination of ARGs. Notably, several ARGs, including blaCTX-M-55, blaTEM-141, blaTEM-1B, aph(3')-IIa, aph(3'')-Ib, aph(6)-Id, tet(A), floR, fosA3, and sul2, were identified on plasmids. In addition, chromosomal point mutations in gyrA (D87G and D87Y) and acrB (F28L and L40P) were also observed in each isolate. Multiple virulence genes associated with the type III secretion system were identified on Salmonella pathogenicity islands (SPIs) SPI-1 and SPI-2. Phylogenetic analysis revealed that the five isolates, along with a clinical and chicken origin isolates in the database, clustered together, suggesting a probable common source of infection. Our findings highlight the intricate genetic mechanisms behind MDR in S. Enteritidis, emphasizing the ongoing necessity for surveillance and appropriate antimicrobial usage. This contributes to our understanding of S. Enteritidis transmission within the food chain.