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埃及亚历山大一株临床分离株中同时存在,,, 和 。

Co-Existence of , , , and in a Clinical Isolate of from Alexandria, Egypt.

机构信息

Department of Immunology, Microbiology and Parasitology, Faculty of Medicine and Nursing, University of the Basque Country, 48940 Leioa, Spain.

Microbiology Service, Health Research Institute (IDIVAL), University Hospital Marqués de Valdecilla, 39008 Santander, Spain.

出版信息

Int J Mol Sci. 2023 Aug 7;24(15):12515. doi: 10.3390/ijms241512515.

Abstract

The increasing rates of antimicrobial resistance among carbapenem-resistant in the Middle East and North Africa are one of the major concerns for healthcare settings. We characterised the first isolate harbouring five β-lactamases identified in Egypt. The isolate Ale25 was obtained from an ICU patient of a hospital from Alexandria. The isolate was phenotypically and genotypically screened for carbapenemase genes. The isolate was resistant to carbapenems, aminoglycosides, fluoroquinolones and cefiderocol. Whole-Genome Sequencing identified five β-lactamase genes, , , , and , together with other antibiotic resistance genes, conferring resistance to sulfonamides, macrolides, tetracyclines, rifamycin and chloramphenicol. Virulome analysis showed the presence of genes involved in adhesion and biofilm production, type II and VI secretion systems, exotoxins, etc. Multi-Locus Sequence Typing analysis identified the isolate as Sequence Types 113 and 2246, belonging to International Clone 7. Sequencing experiments revealed the presence of four plasmids of 2.7, 22.3, 70.4 and 240.8 Kb. All the β-lactamase genes were located in the chromosome, except the , gene which was found within the plasmid of 240.8 Kb. This study highlights the threat of the emergence and dissemination of these types of isolates.

摘要

在中东和北非,耐碳青霉烯类抗生素的 不断增加是医疗机构的主要关注点之一。我们对埃及首次发现的携带五种β-内酰胺酶的 分离株进行了特征描述。该分离株 Ale25 从亚历山大一家医院的 ICU 患者中获得。对该分离株进行了表型和基因型筛选,以确定其是否携带碳青霉烯酶基因。该分离株对碳青霉烯类、氨基糖苷类、氟喹诺酮类和头孢地尔肟耐药。全基因组测序鉴定出五种β-内酰胺酶基因, , , , 和 ,以及其他抗生素耐药基因,使该分离株对磺胺类、大环内酯类、四环素类、利福平和氯霉素耐药。毒力组学分析显示存在与粘附和生物膜形成、II 型和 VI 型分泌系统、外毒素等相关的基因。多位点序列分型分析将该分离株鉴定为序列类型 113 和 2246,属于国际克隆 7。测序实验显示存在大小为 2.7、22.3、70.4 和 240.8 Kb 的四个质粒。除了位于 240.8 Kb 质粒上的 基因外,所有的β-内酰胺酶基因均位于染色体上。本研究强调了这些类型的分离株出现和传播的威胁。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bc7b/10419532/c38829552ec4/ijms-24-12515-g001.jpg

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