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  • Title: Prevalence and risk factors of infections caused by extended-spectrum β-lactamase (ESBL)-producing Enterobacteriaceae.
    Author: Nakai H, Hagihara M, Kato H, Hirai J, Nishiyama N, Koizumi Y, Sakanashi D, Suematsu H, Yamagishi Y, Mikamo H.
    Journal: J Infect Chemother; 2016 May; 22(5):319-26. PubMed ID: 26968486.
    Abstract:
    OBJECTIVE: To study the clinical characteristics and associated risk factors of infections caused by extended-spectrum β-lactamase (ESBL)-producing Enterobacteriaceae. METHODS: A case-control study at a large university hospital in Japan, comparing patients who were infected or colonized with ESBL-producing Enterobacteriaceae (n = 212) and non-ESBL-producing Enterobacteriaceae (n = 2089) in 2010-2013. Data were collected from medical charts, retrospectively. Multivariate logistic regression analysis was used to explore risk factors of ESBL-producing Enterobacteriaceae (Escherichia coli, Klebsiella pneumoniae, Klebsiella oxytoca, Proteus mirabilis) infection or colonization for each pathogen, respectively. RESULTS: ESBL-producing Enterobacteriaceae [E. coli (n = 113), K. oxytoca (n = 46), K. pneumoniae (n = 41), P. mirabilis (n = 12)] were taken from patients were identified in 1409 outpatient and 892 inpatients. Infection or colonization caused by ESBL-producing Enterobacteriaceae was considered to be hospital-acquired, healthcare-associated and community-acquired in 60.4%, 17.9% and 21.7% patients, respectively. Independent risk factors for ESBL-producing Enterobacteriaceae infection or colonization were male sex, cerebrovascular disease, intubation/tracheostomy, major surgery within 60 days (p < 0.001). Moreover, antimicrobial usage (more than 4 days) during preceding 60 days, especially aminoglycoside, oxazolidinone, tetracycline, fluoroquinolone, trimethoprim/sulfamethoxazole, and second- and fourth-generation cephalosporin were risk factors (p < 0.001). However, acquisition location of infection (hospital-acquired and community-onset) was not a risk factor (p > 0.05). CONCLUSION: The problem of ESBL production is no longer limited to hospital-acquired infections. The presence of chronic illness, such as cerebrovascular disease, and recent antimicrobial use were independent risk factors for ESBL-producing Enterobacteriaceae infection or colonization.
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