School of Science, Monash University Malaysia, 47500, Bandar Sunway, Selangor Darul Ehsan, Malaysia.
South East Asia Community Observatory (SEACO) and Global Public Health, Jeffrey Cheah School of Medicine and Health Sciences, Monash University Malaysia, Bandar Sunway, 47500, Subang Jaya, Selangor, Malaysia.
Microb Genom. 2023 Apr;9(4). doi: 10.1099/mgen.0.000977.
is a common cause of multidrug-resistant (MDR) nosocomial infections around the world. However, little is known about the persistence and dynamics of in a healthy community. This study investigated the role of the community as a prospective reservoir for and explored possible links between hospital and community isolates. A total of 12 independent strains were isolated from human faecal samples from the community in Segamat, Malaysia, in 2018 and 2019. Another 15 were obtained in 2020 from patients at the co-located tertiary public hospital. The antimicrobial resistance profile and biofilm formation ability were analysed, and the relatedness of community and hospital isolates was determined using whole-genome sequencing (WGS). Antibiotic profile analysis revealed that 12 out of 15 hospital isolates were MDR, but none of the community isolates were MDR. However, phylogenetic analysis based on single-nucleotide polymorphisms (SNPs) and a pangenome analysis of core genes showed clustering between four community and two hospital strains. Such clustering of strains from two different settings based on their genomes suggests that these strains could persist in both. WGS revealed 41 potential resistance genes on average in the hospital strains, but fewer (=32) were detected in the community strains. In contrast, 68 virulence genes were commonly seen in strains from both sources. This study highlights the possible transmission threat to public health posed by virulent present in the gut of asymptomatic individuals in the community.
是全球多药耐药(MDR)医院感染的常见原因。然而,对于健康社区中 的持久性和动态变化知之甚少。本研究调查了社区作为 的潜在储集层的作用,并探索了医院和社区分离株之间可能存在的联系。2018 年和 2019 年,从马来西亚塞格马特社区的人类粪便样本中分离出 12 株独立的 株。2020 年,从同一地点的三级公立医院的患者中又获得了 15 株。分析了抗生素耐药谱和生物膜形成能力,并通过全基因组测序(WGS)确定了社区和医院分离株之间的亲缘关系。抗生素谱分析显示,15 株医院分离株中有 12 株为 MDR,但没有一株社区分离株为 MDR。然而,基于单核苷酸多态性(SNP)的系统发育分析和核心基因的泛基因组分析表明,4 株社区株和 2 株医院株存在聚类。基于基因组对来自两个不同环境的菌株进行聚类表明,这些菌株可能在两个环境中都存在。WGS 平均在医院菌株中发现了 41 个潜在的耐药基因,但在社区菌株中发现的数量较少(=32)。相比之下,来自两个来源的菌株中都普遍存在 68 个毒力基因。本研究强调了存在于社区无症状个体肠道中的毒力 对公共卫生可能构成的传播威胁。
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