Evolutionary origins of the emergent ST796 clone of vancomycin resistant Enterococcus faecium
MetadataShow full item record
From early 2012, a novel clone of vancomycin resistant Enterococcus faecium (assigned the multi locus sequence type ST796) was simultaneously isolated from geographically separate hospitals in south eastern Australia and New Zealand. Here we describe the complete genome sequence of Ef_aus0233, a representative ST796 E. faecium isolate. We used PacBio single molecule real-time sequencing to establish a high quality, fully assembled genome comprising a circular chromosome of 2,888,087 bp and five plasmids. Comparison of Ef_aus0233 to other E. faecium genomes shows Ef_aus0233 is a member of the epidemic hospital-adapted lineage and has evolved from an ST555- like ancestral progenitor by the accumulation or modification of five mosaic plasmids and five putative prophage, acquisition of two cryptic genomic islands, accrued chromosomal single nucleotide polymorphisms and a 80 kb region of recombination, also gaining Tn1549 and Tn916, transposons conferring resistance to vancomycin and tetracycline respectively. The genomic dissection of this new clone presented here underscores the propensity of the hospital E. faecium lineage to change, presumably in response to the specific conditions of hospital and healthcare environments.
Showing items related by title, author, creator and subject.
Howden, B.; Holt, K.; Lam, M.; Seeman, T.; Ballard, S.; Coombs, Geoffrey; Tong, S.; Grayson, M.; Johnson, P.; Stinear, T. (2013)Nosocomial outbreaks of vancomycin-resistant Enterococcus faecium (VREfm) are thought to occur by transmission of VREfm between patients, predicting that infection control interventions will limit cross-transmission. ...
Vancomycin-resistant Enterococcus faecium sequence type 796 - rapid international dissemination of a new epidemic cloneMahony, A.; Buultjens, A.; Ballard, S.; Grabsch, E.; Xie, S.; Seemann, T.; Stuart, R.; Kotsanas, D.; Cheng, A.; Heffernan, H.; Roberts, S.; Coombs, Geoffrey; Bak, N.; Ferguson, J.; Carter, G.; Howden, B.; Stinear, T.; Johnson, P. (2018)Background: Vancomycin-resistant Enterococcus faecium (VRE) is a leading cause of hospital-acquired infections. New, presumably better-adapted strains of VRE appear unpredictably; it is uncertain how they spread despite ...
Australian Group on Antimicrobial Resistance Australian Enterococcal Sepsis Outcome Programme annual report, 2014Coombs, Geoffrey; Daley, D.; Thin Lee, Y.; Pang, S.; Pearson, J.; Robinson, J.; Johnson, P.; Kotsanas, D.; Bell, J.; Turnidge, J. (2016)From 1 January to 31 December 2014, 27 institutions around Australia participated in the Australian Enterococcal Sepsis Outcome Programme (AESOP). The aim of AESOP 2014 was to determine the proportion of enterococcal ...