Results of the Australian Group on Antimicrobial Resistance surveillance program of 2014 for Enterobacteriacae isolated from blood stream infections are presented. Low but growing rates of extended-spectrum ß-lactamases are now being observed, and carbapenemase-producing strains, although rare, are now being observed.

Resistance to fluoroquinolones remained steady, but multi-drug resistance among E. coli and K. pneumoniae was more common than in 2013.

The Australian Group on Antimicrobial Resistance performs regular period-prevalence studies to monitor changes in antimicrobial resistance in selected enteric Gram-negative pathogens. The 2014 survey was the second year to focus on blood stream infections.

During 2014, 5,798 Enterobacteriaceae species isolates were tested using commercial automated methods (Vitek 2, BioMérieux; Phoenix, BD) and results were analysed using the Clinical and Laboratory Standards Institute (CLSI) and European Committee on Antimicrobial Susceptibility Testing (EUCAST) breakpoints (January 2015).

Of the key resistances, non-susceptibility to the third-generation cephalosporin, ceftriaxone, how to get a free trial of viagra was found in 9.0%/9.0% of Escherichia coli (CLSI/EUCAST criteria) and 7.8%/7.8% of Klebsiella pneumoniae, and 8.0%/8.0% K. oxytoca. Non-susceptibility rates to ciprofloxacin were 10.4%/11.6% for E. coli, 5.0%/7.7% for K. pneumoniae, 0.4%/0.4% for K. oxytoca, and 3.5%/6.5% in Enterobacter cloacae.

Resistance rates to piperacillin-tazobactam were 3.2%/6.8%, 4.8%/7.2%, 11.1%/11.5%, and 19.0%/24.7% for the same 4 species respectively. Fourteen isolates were shown to harbour a carbapenemase gene, 7 blaIMP-4, 3 blaKPC-2, 3 blaVIM-1, 1 blaNDM-4, and 1 blaOXA-181-lke .Commun Dis Intell 2016;40(2):E229–E235.

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