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Antimicrobial Agents and Chemotherapy, June 2007, p. 2192-2194, Vol. 51, No. 6
0066-4804/07/$08.00+0     doi:10.1128/AAC.00139-07
Copyright © 2007, American Society for Microbiology. All Rights Reserved.

Longitudinally Tracking Fluoroquinolone Resistance and Its Determinants in Penicillin-Susceptible and -Nonsusceptible Streptococcus pneumoniae Isolates in Hong Kong, 2000 to 2005{triangledown}

Margaret Ip,* Shirley S. L. Chau, Fang Chi, Edmund S. C. Cheuk, Helen Ma, Raymond W. M. Lai, and Paul K. Chan

Department of Microbiology, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong

Received 30 January 2007/ Returned for modification 21 February 2007/ Accepted 12 March 2007

Of 1,388 Streptococcus pneumoniae isolates collected from 2000 to 2005, 10.5% had a ciprofloxacin MIC of ≥4.0 µg/ml and 1.6% (range, 0.8% to 4.3% per year) had a levofloxacin MIC of ≥4.0 µg/ml. Molecular characterization indicated that fluoroquinolone resistance occurred independently in our prevalent Spain23F-1 clone, expressing serotypes 23F, 19F, and 14. Rates of resistance to levofloxacin in S. pneumoniae have remained stable at a Hong Kong hospital.


* Corresponding author. Mailing address: Department of Microbiology, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong. Phone: (852) 2632 1265. Fax: (852) 2647 3227. E-mail: margaretip{at}cuhk.edu.hk

{triangledown} Published ahead of print on 19 March 2007.


Antimicrobial Agents and Chemotherapy, June 2007, p. 2192-2194, Vol. 51, No. 6
0066-4804/07/$08.00+0     doi:10.1128/AAC.00139-07
Copyright © 2007, American Society for Microbiology. All Rights Reserved.