Yao Zhu, Susu Du, Stefan Schwarz, Jie Hou, Qiu Xu, Longhua Lin, Jiyun Chai, Caiping Ma, Hongfei Sun, Shuangyu Xie, Yongshan Song, Wanjiang Zhang
{"title":"耐甲氧西林波希姆大coccoides bohemicum菌株新型多耐药质粒上恶唑烷酮耐药基因cfr和optrA的共存。","authors":"Yao Zhu, Susu Du, Stefan Schwarz, Jie Hou, Qiu Xu, Longhua Lin, Jiyun Chai, Caiping Ma, Hongfei Sun, Shuangyu Xie, Yongshan Song, Wanjiang Zhang","doi":"10.1093/jac/dkaf333","DOIUrl":null,"url":null,"abstract":"<p><strong>Objectives: </strong>To identify and characterize the oxazolidinone resistance genes cfr and optrA from a methicillin-resistant Macrococcoides bohemicum strain of chicken origin.</p><p><strong>Methods: </strong>The presence of mobile oxazolidinone resistance genes was detected by PCR. Antimicrobial susceptibility testing was conducted by broth microdilution. Transfer experiments were carried out to evaluate horizontal transferability of the plasmid. WGS was performed using a combination of Illumina NovaSeq/Oxford Nanopore PromethION platforms.</p><p><strong>Results: </strong>The M. bohemicum strain HLJ23 exhibited an MDR phenotype and was positive for both cfr and optrA genes. WGS revealed that the genes cfr and optrA co-exist on the novel MDR plasmid pHLJ23-71kb. Although conjugation experiments were unsuccessful, plasmid pHLJ23-71kb could be transferred to Staphylococcus aureus RN4220 by electrotransformation. Genetic context analysis showed that the cfr and optrA together with another four antimicrobial resistance genes are located in an MDR region on plasmid pHLJ23-71kb. Sequence analysis suggested that this MDR region possibly originated from Mammaliicoccus or Staphylococcus spp.</p><p><strong>Conclusions: </strong>To the best of our knowledge, this study represents the first report of the oxazolidinone resistance genes cfr and optrA in the genus Macrococcoides. Furthermore, attention should be paid to the exchange of resistance determinants between members of the genera Staphylococcus, Mammaliicoccus and Macrococcoides.</p>","PeriodicalId":14969,"journal":{"name":"Journal of Antimicrobial Chemotherapy","volume":" ","pages":""},"PeriodicalIF":3.6000,"publicationDate":"2025-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Co-existence of the oxazolidinone resistance genes cfr and optrA on a novel multiresistance plasmid from a methicillin-resistant Macrococcoides bohemicum strain.\",\"authors\":\"Yao Zhu, Susu Du, Stefan Schwarz, Jie Hou, Qiu Xu, Longhua Lin, Jiyun Chai, Caiping Ma, Hongfei Sun, Shuangyu Xie, Yongshan Song, Wanjiang Zhang\",\"doi\":\"10.1093/jac/dkaf333\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><strong>Objectives: </strong>To identify and characterize the oxazolidinone resistance genes cfr and optrA from a methicillin-resistant Macrococcoides bohemicum strain of chicken origin.</p><p><strong>Methods: </strong>The presence of mobile oxazolidinone resistance genes was detected by PCR. Antimicrobial susceptibility testing was conducted by broth microdilution. Transfer experiments were carried out to evaluate horizontal transferability of the plasmid. WGS was performed using a combination of Illumina NovaSeq/Oxford Nanopore PromethION platforms.</p><p><strong>Results: </strong>The M. bohemicum strain HLJ23 exhibited an MDR phenotype and was positive for both cfr and optrA genes. WGS revealed that the genes cfr and optrA co-exist on the novel MDR plasmid pHLJ23-71kb. Although conjugation experiments were unsuccessful, plasmid pHLJ23-71kb could be transferred to Staphylococcus aureus RN4220 by electrotransformation. Genetic context analysis showed that the cfr and optrA together with another four antimicrobial resistance genes are located in an MDR region on plasmid pHLJ23-71kb. Sequence analysis suggested that this MDR region possibly originated from Mammaliicoccus or Staphylococcus spp.</p><p><strong>Conclusions: </strong>To the best of our knowledge, this study represents the first report of the oxazolidinone resistance genes cfr and optrA in the genus Macrococcoides. Furthermore, attention should be paid to the exchange of resistance determinants between members of the genera Staphylococcus, Mammaliicoccus and Macrococcoides.</p>\",\"PeriodicalId\":14969,\"journal\":{\"name\":\"Journal of Antimicrobial Chemotherapy\",\"volume\":\" \",\"pages\":\"\"},\"PeriodicalIF\":3.6000,\"publicationDate\":\"2025-09-22\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Antimicrobial Chemotherapy\",\"FirstCategoryId\":\"3\",\"ListUrlMain\":\"https://doi.org/10.1093/jac/dkaf333\",\"RegionNum\":2,\"RegionCategory\":\"医学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"INFECTIOUS DISEASES\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Antimicrobial Chemotherapy","FirstCategoryId":"3","ListUrlMain":"https://doi.org/10.1093/jac/dkaf333","RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"INFECTIOUS DISEASES","Score":null,"Total":0}
Co-existence of the oxazolidinone resistance genes cfr and optrA on a novel multiresistance plasmid from a methicillin-resistant Macrococcoides bohemicum strain.
Objectives: To identify and characterize the oxazolidinone resistance genes cfr and optrA from a methicillin-resistant Macrococcoides bohemicum strain of chicken origin.
Methods: The presence of mobile oxazolidinone resistance genes was detected by PCR. Antimicrobial susceptibility testing was conducted by broth microdilution. Transfer experiments were carried out to evaluate horizontal transferability of the plasmid. WGS was performed using a combination of Illumina NovaSeq/Oxford Nanopore PromethION platforms.
Results: The M. bohemicum strain HLJ23 exhibited an MDR phenotype and was positive for both cfr and optrA genes. WGS revealed that the genes cfr and optrA co-exist on the novel MDR plasmid pHLJ23-71kb. Although conjugation experiments were unsuccessful, plasmid pHLJ23-71kb could be transferred to Staphylococcus aureus RN4220 by electrotransformation. Genetic context analysis showed that the cfr and optrA together with another four antimicrobial resistance genes are located in an MDR region on plasmid pHLJ23-71kb. Sequence analysis suggested that this MDR region possibly originated from Mammaliicoccus or Staphylococcus spp.
Conclusions: To the best of our knowledge, this study represents the first report of the oxazolidinone resistance genes cfr and optrA in the genus Macrococcoides. Furthermore, attention should be paid to the exchange of resistance determinants between members of the genera Staphylococcus, Mammaliicoccus and Macrococcoides.
期刊介绍:
The Journal publishes articles that further knowledge and advance the science and application of antimicrobial chemotherapy with antibiotics and antifungal, antiviral and antiprotozoal agents. The Journal publishes primarily in human medicine, and articles in veterinary medicine likely to have an impact on global health.