Carbapenem-resistant A. baumannii Bloodstream Isolates

Carbapenem-resistant A. baumannii bloodstream isolates from patients with CRAB between June 2016 and December 2019 at Chonnam National University Hospital (a 1,000-bed tertiary care hospital with eight ICUs in Gwangju, Korea) were stored at −80°C. Species identification was performed initially by matrix-assisted laser desorption ionization-time of flight mass spectrometry-based VITEK MS (bioMérieux, France) and VITEK 2 (bioMérieux) and was confirmed by using MLST-based identification as previously described (Gaiarsa et al., 2019 (link)). Carbapenem resistance was initially determined using the VITEK 2 AST Card (bioMérieux) and confirmed by broth microdilution test (Clinical and Laboratory Standards Institute, 2020 ). Duplicate CRAB isolates from the same patient were excluded.