Qnr prevalence in ceftazidime-resistant Enterobacteriaceae isolates from the United States.

ABSTRACT: We screened 313 ceftazidime-resistant Enterobacteriaceae isolates obtained in the United States from 1999 to 2004 for all three known qnr genes. A qnr gene was present in 20% of Klebsiella pneumoniae isolates, 31% of Enterobacter sp. isolates, and 4% of Escherichia coli isolates. qnrA and qnrB occurred with equivalent frequencies and, except for qnrB in enterobacters, were stable over time. qnrS was absent.

SUBMITTER: Robicsek A 

PROVIDER: S-EPMC1538681 | biostudies-literature | 2006 Aug

REPOSITORIES: biostudies-literature