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从乡村环境淡水中分离的菌株的毒力和抗生素耐药性特征。

Virulence and Antibiotic Resistance Characteristics of Isolates From Rustic Environmental Freshwaters.

机构信息

South Africa Medical Research Center (SAMRC) Microbial Water Quality Monitoring Centre, University of Fort Hare, Alice, South Africa.

Applied and Environmental Microbiology Research Group (AEMREG), Department of Biochemistry and Microbiology, University of Fort Hare, Alice, South Africa.

出版信息

Front Cell Infect Microbiol. 2021 Aug 19;11:732001. doi: 10.3389/fcimb.2021.732001. eCollection 2021.

Abstract

The study investigated the occurrence of antimicrobial resistance genes and virulence determinants in species recovered from different freshwater sheds in rustic milieu. A total of 118 isolates comprising (n=41), (n=40) and (n=37) was identified by amplification of , and genes. The amplification of virulence genes indicated that . (, , , , and ) genes were detected in 12.5%, 32.5%, 45%, 37.5% and 10% respectively. . genes (, and ) were harboured in 48.8%, 14.6% and 19.5% isolates congruently. The other virulence genes that include and were observed in 63.1% and 29% of isolates belonging to . . With the exceptions of imipenem, meropenem and ciprofloxacin, most isolates exhibited more than 50% resistance to antibiotics. The antimicrobial resistance was more prevalent for polymyxin B (100%), azithromycin (100%) and least in ciprofloxacin (16.1%). Multiple antibiotic resistance index range was 0.3 and 0.8 with most isolates showing MARI of 0.8. The TEM, AmpC, GES, IMP, OXA-48 and KPC genes were detected in 53.3%, 42%, 29.6%, 16.6%, 15%, 11.3% and 5.6% of the isolates. Non-beta lactamases such as streptomycin resistance ( and ), gentamicin resistance () and quinolone resistance gene () were found in 5.2%, 44.3%, 26% and 2.8%. Chloramphenicol resistance genes ( and ) were found in 5.2% and 44.3% among the isolates. Our findings reveal the presence of antimicrobial resistance genes and virulent species in aquatic environment which can have potential risk to human and animal's health.

摘要

本研究调查了在乡村自然环境中从不同淡水流域回收的 种中抗菌药物耐药基因和毒力决定因素的发生情况。通过扩增 、 和 基因,共鉴定出 118 株分离株,其中包括 (n=41)、 (n=40)和 (n=37)。毒力基因的扩增表明, ( 、 、 、 和 )基因在 12.5%、32.5%、45%、37.5%和 10%的分离株中被检测到。 基因( 、 和 )在 48.8%、14.6%和 19.5%的分离株中被一致携带。其他毒力基因,包括 和 ,在属于 (n=11)的分离株中分别观察到 63.1%和 29%。除亚胺培南、美罗培南和环丙沙星外,大多数分离株对抗生素的耐药性超过 50%。多药耐药指数范围为 0.3 至 0.8,大多数分离株的 MARI 为 0.8。TEM、AmpC、GES、IMP、OXA-48 和 KPC 基因在 53.3%、42%、29.6%、16.6%、15%、11.3%和 5.6%的分离株中被检测到。非β-内酰胺酶如链霉素耐药( 和 )、庆大霉素耐药( )和喹诺酮耐药基因( )在 5.2%、44.3%、26%和 2.8%的分离株中被发现。氯霉素耐药基因( 和 )在 5.2%和 44.3%的分离株中被发现。我们的研究结果表明,在水生环境中存在抗菌药物耐药基因和毒力 种,这可能对人类和动物的健康构成潜在风险。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5452/8416912/d636ac81a9b3/fcimb-11-732001-g001.jpg

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