Zengfeng Zhang, Mengjun Hu, Kannappan Arunachalam, Chunlei Shi
{"title":"基因组学揭示了鼠伤寒沙门氏菌中抗微生物药物耐药性簇tet(B)、sul2、blatemm - 1b、aph(3″)-Ib和aph(6)-Id的染色体整合。","authors":"Zengfeng Zhang, Mengjun Hu, Kannappan Arunachalam, Chunlei Shi","doi":"10.1089/fpd.2024.0172","DOIUrl":null,"url":null,"abstract":"<p><p>Antimicrobial-resistant <i>Salmonella</i> has posed a huge threat to food safety and public health, and tetracycline is the commonly used antibiotic for treating salmonellosis. In this study, eight <i>Salmonella</i> Typhimurium isolates from diarrhea patients (<i>n</i> = 7) and clam (<i>n</i> = 1) exhibited high-level tetracycline resistance (minimum inhibitory concentration = 128 μg/mL), and these isolates were further resistant to ampicillin and sulfonamides, formatting the R-type ASuT (ampicillin, sulfonamides, and tetracycline). Then, these eight isolates were sequenced using PacBio platform, revealing the presence of tetracycline resistance gene <i>tet</i>(B), along with sulfonamide-resistance gene <i>sul</i>2, extended-spectrum-β-lactamase gene <i>bla</i><sub>TEM-1B</sub>, and aminoglycoside resistance genes <i>aph(3″)</i>-Ib and <i>aph(6)</i>-Id on the chromosome, which was associated with R-type ASuT. Four types (A, B1, B2, and C) of genetic arrangement for chromosomally encoding <i>tet</i>(B) were found, inserted into <i>flj</i>BA operon. Type C (<i>flj</i>BA operon-<i>tet</i>(B)-<i>sul</i>2-<i>bla</i><sub>TEM-1B</sub>-<i>aph(3″)</i>-Ib-<i>aph(6)</i>-Id-<i>mer</i>ACDEPTR) was the most common type and was accompanied by various insertion sequences (ISs) (IS<i>26</i>, IS<i>1</i>, and IS<i>Vsa5</i>) and recombinases. Pairwise sequence alignment showed that type C arrangement likely resulted from stepwise acquisitions and rearrangements facilitated by the actions of ISs, followed by integration into the chromosome by prophages. Phylogenomic analysis showed that all eight <i>Salmonella</i> Typhimurium isolates from China in this study, along with a human-borne <i>Salmonella</i> Typhimurium isolate (DA34821) from Germany and a foodborne <i>Salmonella</i> Typhimurium isolate (CFSA629) from China, clustered into a single clade, sharing ≤67 SNPs, which suggested that clone spread occurred. These findings underline the emergence of R-type ASuT in <i>Salmonella</i> Typhimurium, which is attributed to the presence of an antimicrobial resistance gene cluster (<i>tet</i>(B), <i>sul</i>2, <i>bla</i><sub>TEM-1B</sub>, <i>aph(3″)</i>-Ib, and <i>aph(6)</i>-Id) encoded on the chromosome.</p>","PeriodicalId":12333,"journal":{"name":"Foodborne pathogens and disease","volume":" ","pages":""},"PeriodicalIF":1.9000,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Genomics Revealed Novel Chromosomal Integration of Antimicrobial Resistance Cluster <i>tet</i>(B), <i>sul</i>2, <i>bla</i><sub>TEM-1B</sub>, <i>aph(3″</i>)-Ib, and <i>aph(6)</i>-Id in <i>Salmonella</i> Typhimurium.\",\"authors\":\"Zengfeng Zhang, Mengjun Hu, Kannappan Arunachalam, Chunlei Shi\",\"doi\":\"10.1089/fpd.2024.0172\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>Antimicrobial-resistant <i>Salmonella</i> has posed a huge threat to food safety and public health, and tetracycline is the commonly used antibiotic for treating salmonellosis. In this study, eight <i>Salmonella</i> Typhimurium isolates from diarrhea patients (<i>n</i> = 7) and clam (<i>n</i> = 1) exhibited high-level tetracycline resistance (minimum inhibitory concentration = 128 μg/mL), and these isolates were further resistant to ampicillin and sulfonamides, formatting the R-type ASuT (ampicillin, sulfonamides, and tetracycline). Then, these eight isolates were sequenced using PacBio platform, revealing the presence of tetracycline resistance gene <i>tet</i>(B), along with sulfonamide-resistance gene <i>sul</i>2, extended-spectrum-β-lactamase gene <i>bla</i><sub>TEM-1B</sub>, and aminoglycoside resistance genes <i>aph(3″)</i>-Ib and <i>aph(6)</i>-Id on the chromosome, which was associated with R-type ASuT. Four types (A, B1, B2, and C) of genetic arrangement for chromosomally encoding <i>tet</i>(B) were found, inserted into <i>flj</i>BA operon. Type C (<i>flj</i>BA operon-<i>tet</i>(B)-<i>sul</i>2-<i>bla</i><sub>TEM-1B</sub>-<i>aph(3″)</i>-Ib-<i>aph(6)</i>-Id-<i>mer</i>ACDEPTR) was the most common type and was accompanied by various insertion sequences (ISs) (IS<i>26</i>, IS<i>1</i>, and IS<i>Vsa5</i>) and recombinases. Pairwise sequence alignment showed that type C arrangement likely resulted from stepwise acquisitions and rearrangements facilitated by the actions of ISs, followed by integration into the chromosome by prophages. Phylogenomic analysis showed that all eight <i>Salmonella</i> Typhimurium isolates from China in this study, along with a human-borne <i>Salmonella</i> Typhimurium isolate (DA34821) from Germany and a foodborne <i>Salmonella</i> Typhimurium isolate (CFSA629) from China, clustered into a single clade, sharing ≤67 SNPs, which suggested that clone spread occurred. These findings underline the emergence of R-type ASuT in <i>Salmonella</i> Typhimurium, which is attributed to the presence of an antimicrobial resistance gene cluster (<i>tet</i>(B), <i>sul</i>2, <i>bla</i><sub>TEM-1B</sub>, <i>aph(3″)</i>-Ib, and <i>aph(6)</i>-Id) encoded on the chromosome.</p>\",\"PeriodicalId\":12333,\"journal\":{\"name\":\"Foodborne pathogens and disease\",\"volume\":\" \",\"pages\":\"\"},\"PeriodicalIF\":1.9000,\"publicationDate\":\"2025-05-16\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Foodborne pathogens and disease\",\"FirstCategoryId\":\"97\",\"ListUrlMain\":\"https://doi.org/10.1089/fpd.2024.0172\",\"RegionNum\":2,\"RegionCategory\":\"农林科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"FOOD SCIENCE & TECHNOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Foodborne pathogens and disease","FirstCategoryId":"97","ListUrlMain":"https://doi.org/10.1089/fpd.2024.0172","RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"FOOD SCIENCE & TECHNOLOGY","Score":null,"Total":0}
Genomics Revealed Novel Chromosomal Integration of Antimicrobial Resistance Cluster tet(B), sul2, blaTEM-1B, aph(3″)-Ib, and aph(6)-Id in Salmonella Typhimurium.
Antimicrobial-resistant Salmonella has posed a huge threat to food safety and public health, and tetracycline is the commonly used antibiotic for treating salmonellosis. In this study, eight Salmonella Typhimurium isolates from diarrhea patients (n = 7) and clam (n = 1) exhibited high-level tetracycline resistance (minimum inhibitory concentration = 128 μg/mL), and these isolates were further resistant to ampicillin and sulfonamides, formatting the R-type ASuT (ampicillin, sulfonamides, and tetracycline). Then, these eight isolates were sequenced using PacBio platform, revealing the presence of tetracycline resistance gene tet(B), along with sulfonamide-resistance gene sul2, extended-spectrum-β-lactamase gene blaTEM-1B, and aminoglycoside resistance genes aph(3″)-Ib and aph(6)-Id on the chromosome, which was associated with R-type ASuT. Four types (A, B1, B2, and C) of genetic arrangement for chromosomally encoding tet(B) were found, inserted into fljBA operon. Type C (fljBA operon-tet(B)-sul2-blaTEM-1B-aph(3″)-Ib-aph(6)-Id-merACDEPTR) was the most common type and was accompanied by various insertion sequences (ISs) (IS26, IS1, and ISVsa5) and recombinases. Pairwise sequence alignment showed that type C arrangement likely resulted from stepwise acquisitions and rearrangements facilitated by the actions of ISs, followed by integration into the chromosome by prophages. Phylogenomic analysis showed that all eight Salmonella Typhimurium isolates from China in this study, along with a human-borne Salmonella Typhimurium isolate (DA34821) from Germany and a foodborne Salmonella Typhimurium isolate (CFSA629) from China, clustered into a single clade, sharing ≤67 SNPs, which suggested that clone spread occurred. These findings underline the emergence of R-type ASuT in Salmonella Typhimurium, which is attributed to the presence of an antimicrobial resistance gene cluster (tet(B), sul2, blaTEM-1B, aph(3″)-Ib, and aph(6)-Id) encoded on the chromosome.
期刊介绍:
Foodborne Pathogens and Disease is one of the most inclusive scientific publications on the many disciplines that contribute to food safety. Spanning an array of issues from "farm-to-fork," the Journal bridges the gap between science and policy to reduce the burden of foodborne illness worldwide.
Foodborne Pathogens and Disease coverage includes:
Agroterrorism
Safety of organically grown and genetically modified foods
Emerging pathogens
Emergence of drug resistance
Methods and technology for rapid and accurate detection
Strategies to destroy or control foodborne pathogens
Novel strategies for the prevention and control of plant and animal diseases that impact food safety
Biosecurity issues and the implications of new regulatory guidelines
Impact of changing lifestyles and consumer demands on food safety.