Emergence of blaOXA-181-bearing tigecycline-resistant Klebsiella aerogenes in China.

IF 2.1 4区 生物学 Q3 MICROBIOLOGY
Yinfei Fang, Zhaoxia Wu, Wen Zheng, Hongwei Zhou, Lingna Hu, Qiong Xiao, Lihong Bo, Kai Shen, Yongjun Ma
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引用次数: 0

Abstract

We report the isolation of a blaOXA-181-positive, tigecycline-resistant Klebsiella aerogenes strain KA04 from a Chinese inpatient's fecal sample. Species identification was performed using MALDI-TOF MS. The antibiotic susceptibilities were assessed via the broth microdilution method. To elucidate the transmission and genetic structure of the blaOXA-181 gene, conjugation assays and whole-genome sequencing (WGS) were performed. KA04 displayed resistance to carbapenems, quinolones, piperacillin/tazobactam and tigecycline. Through WGS and conjugation experiments, it was possible to confirm blaOXA-181 and qnrS1 genes causing antibiotic resistance were located on a 51-kb IncX3 type mobile plasmid, blaOXA-181 gene could be successfully transferred into E. coli EC600 at a conjugation frequency of 1.1 × 10- 4. tet(A) gene was located on both the chromosome and non-transmissible IncFIB(K) plasmid. This is a tigecycline-resistant K. aerogenes harboring blaOXA-181 isolate from human fecal sample, highlighting a significant public health concern. Further comprehensive surveillance is needed.

中国出现含 blaOXA-181 的耐十环素克雷伯菌。
我们报告了从一名中国住院病人的粪便样本中分离出一株 blaOXA-181 阳性、耐虎头环素的产气克雷伯氏菌 KA04。采用 MALDI-TOF MS 进行了菌种鉴定。抗生素敏感性通过肉汤微稀释法进行评估。为阐明 blaOXA-181 基因的传播和遗传结构,进行了共轭测定和全基因组测序(WGS)。KA04 对碳青霉烯类、喹诺酮类、哌拉西林/他唑巴坦和替加环素具有耐药性。通过 WGS 和共轭实验,可以确认引起抗生素耐药性的 blaOXA-181 和 qnrS1 基因位于一个 51-kb 的 IncX3 型移动质粒上,blaOXA-181 基因可以以 1.1 × 10- 4 的共轭频率成功转入大肠杆菌 EC600。这是一个从人类粪便样本中分离出的对替加环素耐药的产气荚膜梭菌,携带 blaOXA-181,突显了一个重大的公共卫生问题。需要进一步进行全面监测。
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来源期刊
Brazilian Journal of Microbiology
Brazilian Journal of Microbiology 生物-微生物学
CiteScore
4.10
自引率
4.50%
发文量
216
审稿时长
1.0 months
期刊介绍: The Brazilian Journal of Microbiology is an international peer reviewed journal that covers a wide-range of research on fundamental and applied aspects of microbiology. The journal considers for publication original research articles, short communications, reviews, and letters to the editor, that may be submitted to the following sections: Biotechnology and Industrial Microbiology, Food Microbiology, Bacterial and Fungal Pathogenesis, Clinical Microbiology, Environmental Microbiology, Veterinary Microbiology, Fungal and Bacterial Physiology, Bacterial, Fungal and Virus Molecular Biology, Education in Microbiology. For more details on each section, please check out the instructions for authors. The journal is the official publication of the Brazilian Society of Microbiology and currently publishes 4 issues per year.
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