Increased Prevalence of Class I Integrons in Escherichia coli , Klebsiella Species, and Enterobacter Species Isolates over a 7-Year Period in a German University Hospital

Author:

Schmitz Franz-Josef12,Hafner Dieter3,Geisel Roland1,Follmann Patrick1,Kirschke Christian1,Verhoef Jan2,Köhrer Karl1,Fluit Ad C.2

Affiliation:

1. Institute for Medical Microbiology and Virology1 and

2. Eijkman-Winkler Institute for Medical Microbiology, University Medical Center Utrecht, Utrecht, The Netherlands2

3. Institute of Pharmacology and Clinical Pharmacology,3 Heinrich-Heine University Düsseldorf, Düsseldorf, Germany, and

Abstract

ABSTRACT The prevalence of integrons in five enterobacterial species was analyzed in 900 blood culture isolates from 1993, 1996, and 1999. Remarkably, the prevalence increased from 4.7% in 1993 to 9.7% in 1996 and finally to 17.4% in 1999 ( P < 0.01). Within 7 years the combined percentage of P1 strong promoters and P1 weak plus P2 active promoters with high transcription efficacies has increased from 23.1 to 33.3 and finally 60% ( P < 0.05).

Publisher

American Society for Microbiology

Subject

Microbiology (medical)

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