Emergence and spread of carbapenem-resistant Acinetobacter baumannii sequence type 191 in a Korean hospital.

Emergence and spread of specific carbapenem-resistant Acinetobacter baumannii (CRAB) clones cause a serious therapeutic problem. This study was aimed to investigate the clonal diversity and genetic basis of antimicrobial resistance among the 69 CRAB isolates from 2009 to 2010 in a Korean hospital. All CRAB isolates were found to be sequence type (ST) 2 using the Institute Pasteur's multilocus sequence typing (MLST) scheme, but classified into two sequence groups and nine pulsotypes.