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High contiguity genome sequence of a multidrug-resistant hospital isolate of Enterobacter hormaechei.

Abstract：

Background:Enterobacter hormaechei is an important emerging pathogen and a key member of the highly diverse Enterobacter cloacae complex. E. hormaechei strains can persist and spread in nosocomial environments, and often exhibit resistance to multiple clinically important antibiotics. However, the genomic regions that harbour resistance determinants are typically highly repetitive and impossible to resolve with standard short-read sequencing technologies. Results:Here we used both short- and long-read methods to sequence the genome of a multidrug-resistant hospital isolate (C15117), which we identified as E. hormaechei. Hybrid assembly generated a complete circular chromosome of 4,739,272 bp and a fully resolved plasmid of 339,920 bp containing several antibiotic resistance genes. The strain also harboured a 34,857 bp repeat encoding copper resistance, which was present in both the chromosome and plasmid. Long reads that unambiguously spanned this repeat were required to resolve the chromosome and plasmid into separate replicons. Conclusion:This study provides important insights into the evolution and potential spread of antimicrobial resistance in a nosocomial E. hormaechei strain. More broadly, it further exemplifies the power of long-read sequencing technologies, particularly the Oxford Nanopore platform, for the characterisation of bacteria with complex resistance loci and large repeat elements.

journal_name

Gut Pathog

journal_title

Gut pathogens

authors

Monahan LG,DeMaere MZ,Cummins ML,Djordjevic SP,Roy Chowdhury P,Darling AE

doi

10.1186/s13099-019-0288-7

subject

Has Abstract

pub_date

2019-02-13 00:00:00

pages

3

issn

1757-4749

pii

288

journal_volume

11

pub_type

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