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Prevalence and epidemiology of microbial pathogens causing bloodstream infections: results of the OASIS multicenter study.

Abstract：

:Beginning on April 2007, a prospective multicenter study was performed to investigate prevalence and epidemiology of microbial pathogens causing bloodstream infections (BSIs). Twenty microbiology laboratories participated to the survey over a 1-year period. A total of 11,638 episodes of BSI occurred in 11 202 patients, with 8.5% (n=985) of episodes being polymicrobial. Of 12 781 causative organisms, aerobic Gram-negative bacteria were 47.4% (n=6058), whereas Gram-positives accounted for 43.9% (n=5608). The remaining organisms included fungal species (n=924, 7.2%) and anaerobes (n=191, 1.5%). The most prevalent agents were Escherichia coli (21.7%), Staphylococcus aureus (14.9%), Staphylococcus epidermidis (8.2%), Pseudomonas aeruginosa (7.0%), and Enterococcus faecalis (6.3%). Isolates recovered from patients admitted to medical, surgical, and intensive care units accounted for 62.9%, 17.7%, and 19.4% of cases, respectively. BSIs were classified as hospital-acquired in 67.2% of cases. Compared with previous studies, our data show an increasing role of Gram-negative bacteria among both hospital- and community-acquired blood isolates.

journal_name

Diagn Microbiol Infect Dis

journal_title

Diagnostic microbiology and infectious disease

authors

Luzzaro F,Ortisi G,Larosa M,Drago M,Brigante G,Gesu G

doi

10.1016/j.diagmicrobio.2010.10.016

subject

Has Abstract

pub_date

2011-04-01 00:00:00

pages

363-9

issue

4

eissn

0732-8893

issn

1879-0070

pii

S0732-8893(10)00457-8

journal_volume

69

pub_type

杂志文章,多中心研究

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