Evaluation of the MICRONAUT MIC-strip colistin assay for colistin susceptibility testing of carbapenem-resistant Acinetobacter baumannii and Enterobacterales.

We sought to evaluate the MICRONAUT MIC-Strip colistin (MMS) assay, a commercial broth microdilution (BMD) panel, using 273 carbapenem-resistant Acinetobacter baumannii and Enterobacterales isolates. BMD was used as gold standard. MMS had 98.5% sensitivity and 99.5% specificity. All 37 isolates with MICs close to the breakpoint exhibited complete agreement.