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Journal of Clinical Microbiology, August 2005, p. 4218-4220, Vol. 43, No. 8
0095-1137/05/$08.00+0 doi:10.1128/JCM.43.8.4218-4220.2005
Copyright © 2005, American Society for Microbiology. All Rights Reserved.
Decreased Prevalence of Virulence Factors among Ciprofloxacin-Resistant Uropathogenic Escherichia coli Isolates
S. J. Drews,1,2
S. M. Poutanen,1,2
T. Mazzulli,1,2
A. J. McGeer,1,2
A. Sarabia,3
S. Pong-Porter,1
Y. Rzayev,1
B. Willey,1
K. Green,1 and
D. E. Low1,2*
Toronto Medical Laboratories & Mount Sinai Hospital, Toronto, Ontario, Canada,1
University of Toronto, Toronto, Ontario, Canada,2
MDS Laboratories, Toronto, Ontario, Canada3
Received 12 January 2005/
Returned for modification 28 February 2005/
Accepted 25 April 2005
Ciprofloxacin resistance was identified in 18% and 6% of consecutively collected, clinically significant urinary tract isolates of Escherichia coli from inpatients and outpatients, respectively. In comparison to ciprofloxacin-susceptible isolates, there were fewer resistant isolates that expressed beta-hemolysis (outpatient, 9% versus 87%, P < 0.0001; inpatient, 4% versus 76%, P < 0.0001) and that had a papEF genotype, genes encoding P fimbriae (outpatient, 30% versus 70%, P = 0.0004; inpatient, 26% versus 70%, P < 0.0001).
* Corresponding author. Mailing address: Toronto Medical Laboratories & Mount Sinai Hospital, Department of Microbiology, Room 1470, 600 University Avenue, Toronto, ON, Canada, M5G 1X5. Phone: (416) 586-4435. Fax: (416) 586-8746. E-mail:
dlow{at}mtsinai.on.ca.
Journal of Clinical Microbiology, August 2005, p. 4218-4220, Vol. 43, No. 8
0095-1137/05/$08.00+0 doi:10.1128/JCM.43.8.4218-4220.2005
Copyright © 2005, American Society for Microbiology. All Rights Reserved.
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