Metronidazole- and carbapenem-resistant Bacteroides thetaiotaomicron isolated in Rochester, Minnesota, in 2014

Sapna P. Sadarangani, Scott A. Cunningham, Patricio R. Jeraldo, John W. Wilson, Reeti Khare, Robin Patel

Research output: Contribution to journalArticlepeer-review

22 Scopus citations


Emerging antimicrobial resistance in members of the Bacteroides fragilis group is a concern in clinical medicine. Although metronidazole and carbapenem resistance have been reported in Bacteroides thetaiotaomicron, a member of the B. fragilis group, they have not, to the best of our knowledge, been reported together in the same B. thetaiotaomicron isolate. Herein, we report isolation of piperacillin-tazobactam-, metronidazole-, clindamycin-, ertapenem-, and meropenem-resistant B. thetaiotaomicron from a patient with postoperative intra-abdominal abscess and empyema. Whole-genome sequencing demonstrated the presence of nimD with at least a portion of IS1169 upstream, a second putative nim gene, two β-lactamase genes (one of which has not been previously reported), two tetX genes, tetQ, ermF, two cat genes, and a number of efflux pumps. This report highlights emerging antimicrobial resistance in B. thetaiotaomicron and the importance of identification and antimicrobial susceptibility testing of selected anaerobic bacteria.

Original languageEnglish (US)
Pages (from-to)4157-4161
Number of pages5
JournalAntimicrobial Agents and Chemotherapy
Issue number7
StatePublished - Jul 1 2015

ASJC Scopus subject areas

  • Pharmacology
  • Pharmacology (medical)
  • Infectious Diseases


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