Treatment outcome of bacteremia due to KPC-producing Klebsiella pneumoniae: Superiority of combination antimicrobial regimens

Zubair A. Qureshi, David L. Paterson, Brian A. Potoski, Mary C. Kilayko, Gabriel Sandovsky, Emilia Sordillo, Bruce Polsky, Jennifer M. Adams-Haduch, Yohei Doi

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477 Citations (Scopus)


Klebsiella pneumoniae producing Klebsiella pneumoniae carbapenemase (KPC) has been associated with serious infections and high mortality. The optimal antimicrobial therapy for infection due to KPC-producing K. pneumoniae is not well established. We conducted a retrospective cohort study to evaluate the clinical outcome of patients with bacteremia caused by KPC-producing K. pneumoniae. A total of 41 unique patients with blood cultures growing KPC-producing K. pneumoniae were identified at two medical centers in the United States. Most of the infections were hospital acquired (32; 78%), while the rest of the cases were health care associated (9; 22%). The overall 28-day crude mortality rate was 39.0% (16/41). In the multivariate analysis, definitive therapy with a combination regimen was independently associated with survival (odds ratio, 0.07 [95% confidence interval, 0.009 to 0.71], P=0.02). The 28-day mortality was 13.3% in the combination therapy group compared with 57.8% in the monotherapy group (P=0.01). The most commonly used combinations were colistin-polymyxin B or tigecycline combined with a carbapenem. The mortality in this group was 12.5% (1/8). Despite in vitro susceptibility, patients who received monotherapy with colistin-polymyxin B or tigecycline had a higher mortality of 66.7% (8/12). The use of combination therapy for definitive therapy appears to be associated with improved survival in bacteremia due to KPC-producing K. pneumoniae.

Original languageEnglish
Pages (from-to)2108-2113
Number of pages6
JournalAntimicrobial agents and chemotherapy
Issue number4
Publication statusPublished - 04-2012
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Pharmacology
  • Pharmacology (medical)
  • Infectious Diseases


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