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Genomic plasticity associated with antimicrobial resistance in Vibrio cholerae.

Published version
Peer-reviewed

Type

Article

Change log

Authors

Verma, Jyoti 
Bag, Satyabrata 
Saha, Bipasa 
Kumar, Pawan 
Ghosh, Tarini Shankar 

Abstract

The Bay of Bengal is known as the epicenter for seeding several devastating cholera outbreaks across the globe. Vibrio cholerae, the etiological agent of cholera, has extraordinary competency to acquire exogenous DNA by horizontal gene transfer (HGT) and adapt them into its genome for structuring metabolic processes, developing drug resistance, and colonizing the human intestine. Antimicrobial resistance (AMR) in V. cholerae has become a global concern. However, little is known about the identity of the resistance traits, source of AMR genes, acquisition process, and stability of the genetic elements linked with resistance genes in V. cholerae Here we present details of AMR profiles of 443 V. cholerae strains isolated from the stool samples of diarrheal patients from two regions of India. We sequenced the whole genome of multidrug-resistant (MDR) and extensively drug-resistant (XDR) V. cholerae to identify AMR genes and genomic elements that harbor the resistance traits. Our genomic findings were further confirmed by proteome analysis. We also engineered the genome of V. cholerae to monitor the importance of the autonomously replicating plasmid and core genome in the resistance profile. Our findings provided insights into the genomes of recent cholera isolates and identified several acquired traits including plasmids, transposons, integrative conjugative elements (ICEs), pathogenicity islands (PIs), prophages, and gene cassettes that confer fitness to the pathogen. The knowledge generated from this study would help in better understanding of V. cholerae evolution and management of cholera disease by providing clinical guidance on preferred treatment regimens.

Description

Keywords

antimicrobial resistance, cholera, genome, mobile genetic elements, proteome, Anti-Bacterial Agents, Cholera, Conjugation, Genetic, DNA Transposable Elements, Diarrhea, Drug Resistance, Multiple, Bacterial, Evolution, Molecular, Feces, Gene Transfer, Horizontal, Genetic Variation, Genome, Bacterial, Genomic Islands, Humans, Imipenem, India, Interspersed Repetitive Sequences, Phenotype, Plasmids, Prophages, Proteome, Vibrio cholerae, Vibrio cholerae O1, Whole Genome Sequencing

Journal Title

Proc Natl Acad Sci U S A

Conference Name

Journal ISSN

0027-8424
1091-6490

Volume Title

116

Publisher

Proceedings of the National Academy of Sciences

Rights

Publisher's own licence
Sponsorship
DBT India