| clonal spread of carbapenem-resistant oxa-23-positive acinetobacter baumannii in a bulgarian university hospital. | from october 1999 to september 2006, 29 carbapenem-resistant isolates of acinetobacter baumannii were collected consecutively from patients hospitalized in different wards of the university hospital in pleven, bulgaria. the bla(oxa-23) gene, associated with the upstream-located isaba1, was identified as the mechanism responsible for carbapenem resistance in all isolates. the isolates belonged to two different clonal groups, indicating a sustained hospital outbreak. this study demonstrates both t ... | 2008 | 18558947 |