Genomic insights into virulence, antimicrobial resistance, and adaptation acumen of Escherichia coli isolated from an urban environment

被引:10
|
作者
Saini, Poorvi [1 ]
Bandsode, Viraj [1 ]
Singh, Anuradha [1 ]
Mendem, Suresh Kumar [1 ]
Semmler, Torsten [2 ]
Alam, Munirul [3 ]
Ahmed, Niyaz [1 ]
机构
[1] Univ Hyderabad, Dept Biotechnol & Bioinformat, Pathogen Biol Lab, Hyderabad, Telangana, India
[2] Robert Koch Inst, Berlin, Germany
[3] Bangladesh Icddr B, Int Ctr Diarrheal Dis Res, Dhaka, Bangladesh
来源
MBIO | 2024年 / 15卷 / 03期
关键词
Escherichia coli; genome analysis; virulence; antimicrobial resistance; environment; URINARY-TRACT-INFECTIONS; EFFLUX PUMP; SEQUENCE; QUALITY; GENES; EPIDEMIOLOGY; SPECIFICITY; EVOLUTION; COMMENSAL; GENETICS;
D O I
10.1128/mbio.03545-23
中图分类号
Q93 [微生物学];
学科分类号
071005 ; 100705 ;
摘要
Populations of common commensal bacteria such as Escherichia coli undergo genetic changes by the acquisition of certain virulence and antimicrobial resistance (AMR) encoding genetic elements leading to the emergence of pathogenic strains capable of surviving in the previously uninhabited or protected niches. These bacteria are also reported to be prevalent in the environment where they survive by adopting various recombination strategies to counter microflora of the soil and water, under constant selection pressure(s). In this study, we performed molecular characterization, phenotypic AMR analysis, and whole genome sequencing (WGS) of E. coli (n = 37) isolated from soil and surface water representing the urban and peri-urban areas. The primary aim of this study was to understand the genetic architecture and pathogenic acumen exhibited by environmental E. coli. WGS-based analysis entailing resistome and virulome profiling indicated the presence of various virulence (adherence, iron uptake, and toxins) and AMR encoding genes, including blaNDM-5 in the environmental isolates. A majority of our isolates belonged to phylogroup B1 (73%). A few isolates in our collection were of sequence type(s) (ST) 58 and 224 that could have emerged recently as clonal lineages and might pose risk of infection/transmission. Mobile genetic elements (MGEs) such as plasmids (predominantly) of the IncF family, prophages, pipolins, and insertion elements such as IS1 and IS5 were also observed to exist, which may presumably aid in the propagation of genes encoding resistance against antimicrobial drugs. The observed high prevalence of MGEs associated with multidrug resistance in pathogenic E. coli isolates belonging to the phylogroup B1 underscores the need for extended surveillance to keep track of and prevent the transmission of the bacterium to certain vulnerable human and animal populations.
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页数:18
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