Murdoch University Research Repository

Welcome to the Murdoch University Research Repository

The Murdoch University Research Repository is an open access digital collection of research
created by Murdoch University staff, researchers and postgraduate students.

Learn more

Australian Group on Antimicrobial Resistance (AGAR) Australian Enterococcal Sepsis Outcome Programme (AESOP) Annual Report 2020

Coombs, G.W.ORCID: 0000-0003-1635-6506, Daley, D.A., Yee, N.W.T. and Mowlaboccus, S. (2022) Australian Group on Antimicrobial Resistance (AGAR) Australian Enterococcal Sepsis Outcome Programme (AESOP) Annual Report 2020. Communicable Diseases Intelligence, 46 .

[img]
Preview
PDF - Published Version
Download (521kB) | Preview
Free to read: https://doi.org/10.33321/cdi.2022.46.17
*No subscription required

Abstract

From 1 January to 31 December 2020, forty-nine institutions around Australia participated in the Australian Enterococcal Sepsis Outcome Programme (AESOP). The aims of AESOP 2020 were to determine the proportion of enterococcal bacteraemia isolates in Australia that were antimicrobialresistant, and to characterise the molecular epidemiology of the E. faecium isolates. Of the 1,230 unique episodes of enterococcal bacteraemia investigated, 93.9% were caused by either E. faecalis (54.2%) or E. faecium (39.7%). Ampicillin resistance was not detected in E. faecalis but was detected in 88.2% of E. faecium. Vancomycin non-susceptibility was detected in 0.2% of E. faecalis and 32.6% of E. faecium. Overall, 35.2% of E. faecium harboured vanA and/or vanB genes. For the vanA/B positive E. faecium isolates, 38.8% harboured the vanA gene, 60.6% the vanB gene, and 0.6% harboured both vanA and vanB. Although the percentage of E. faecium bacteraemia isolates was significantly lower than that detected in the 2019 AESOP (presumably due to the COVID-19 elective surgery restrictions placed on hospitals), it remains substantially higher than that recorded in most European countries. The E. faecium isolates detected consisted of 71 multilocus sequence types (STs), with 81.7% of these isolates classified into eight major STs each containing ten or more isolates. All major STs belonged to clonal cluster 17 (CC17), a major hospital-adapted polyclonal E. faecium cluster. The major STs (ST17, ST1424, ST80, ST796, ST78, ST1421, ST555 and ST117) were found across most regions of Australia. The predominant clone was ST17, which was identified in all regions except the Northern Territory. Overall, 40.9% of isolates belonging to the eight major STs harboured the vanA or vanB gene. The AESOP 2020 has shown enterococcal bacteraemia episodes in Australia are frequently caused by polyclonal ampicillin-resistant high-level gentamicin-resistant vanA- or vanB-positive E. faecium which have limited treatment options.

Item Type: Journal Article
Murdoch Affiliation(s): Antimicrobial Resistance and Infectious Disease Laboratory
Publisher: Australian Government. Dept. of Health
Copyright: © 2022 Commonwealth of Australia as represented by the Department of Health
URI: http://researchrepository.murdoch.edu.au/id/eprint/64682
Item Control Page Item Control Page

Downloads

Downloads per month over past year