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KMID : 0648620140190020045
Korean Journal of Nosocomial Infection Control
2014 Volume.19 No. 2 p.45 ~ p.51
Comparison of Extended-Spectrum ¥â-Lactamase-Producing Escherichia coli and Klebsiella pneumoniae Bloodstream Infection Epidemiology
Yoon Phill-Hoon

Cho Eun-Bin
Kim Su-Ji
Lee Yeon-Hee
Seo Yiel-Hea
Park Yoon-Soo
Abstract
Background: Extended-spectrum ¥â-lactamase (ESBL)-producing Escherichia coli and Klebsiella pneumoniae are main pathogens of bloodstream infection. We compared the epidemiology of ESBL-producing E. coli and K. pneumoniae.

Methods: From January 2003 through March 2007, we retrospectively investigated the clinical characteristics and comorbidities of patients with bloodstream infection by ESBL-producing E. coli and K. pneumoniae.

Results: During the study period, 79 patients (54 with E. coli and 25 with K. pneumoniae) with blood cultures positive for ESBL-producing E. coli or K. pneumoniae were studied. When comparing the source of bloodstream infections, urinary tract infections (UTIs) were more commonly caused by E. coli (24% vs. 0; P=0.007), and respiratory tract and soft tissue infection (36% vs. 15%; P=0.04, 12% vs. 0; P=0.03, respectively) were more commonly associated with K. pneumoniae. Among hospital-acquired bloodstream infection, third-generation cephalosporin was more commonly used in patients with E. coli than patients with K. pneumoniae (81% vs. 24%, P£¼0.001). Medical devices (central venous catheter and urinary catheter) were more commonly used in patients with K. pneumoniae.

Conclusion: ESBL-producing E. coli bloodstream infection is more common in urinary tract infections. ESBL-producing K. pneumoniae is more common in respiratory tract infections and in skin and soft tissue infections. In hospital-acquired infections, ESBL-producing E. coli bloodstream infection is more common in biliary tract infection. ESBL-producing E. coli was more commonly associated with prior frequent antibiotics use and K. pneumoniae was more commonly associated with use of medical devices.
KEYWORD
Bloodstream infection, Epidemiology, ESBL, Escherichia coli, Klebsiella pneumoniae
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