Journal
CLINICAL INFECTIOUS DISEASES
Volume 37, Issue 1, Pages 26-32Publisher
UNIV CHICAGO PRESS
DOI: 10.1086/375594
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IMP-type metallo-beta-lactamase-producing bacteria have recently emerged worldwide. We conducted a case-control study in which 69 inpatients harboring bla(IMP)-positive Pseudomonas aeruginosa and 247 control subjects with bla(IMP)-negative pathogens were investigated. Prolonged hospitalization, antineoplastic chemotherapy, corticosteroid therapy (P=.001), and indwelling urinary catheters (P=.04) were risk factors for isolation of bla(IMP)-positive pathogens. The predominant source was urine (P=.001). The duration of antibiotic treatment and the total dose ( including of carbapenems) were significantly greater among case patients than among control subjects (P<.01). bla(IMP)-positive P. aeruginosa isolates were more frequently resistant to multiple drugs (P=.001) and caused more infections (P=.001) than bla(IMP)-negative pathogens. There were no significant differences in bacteriological outcome (P=.94); however, infection-related death was more frequent among case patients than among control subjects (P=.023). These results suggest that precautionary measures against the spread of bla(IMP)-positive isolates are needed, because, for most of such pathogens, no antibiotic is potent enough to be used as a single agent in treatment of infection.
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