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Volume 9, Number 9—September 2003

Research

Aggregated Antibiograms and Monitoring of Drug-Resistant Streptococcus pneumoniae

Chris A. Van Beneden*Comments to Author , Catherine Lexau†, Wendy Baughman‡, Brenda Barnes§, Nancy Bennett¶, P. Maureen Cassidy#, Margaret Pass**, Lisa Gelling††, Nancy L. Barrett‡‡, Elizabeth R. Zell*, and Cynthia G. Whitney*
Author affiliations: *Centers for Disease Control and Prevention, Atlanta, Georgia, USA; †Minnesota Department of Health, Minneapolis, Minnesota, USA; ‡Veterans Affairs Medical Center, Atlanta, Georgia, USA; §Vanderbilt Medical Center, Nashville, Tennessee, USA; ¶Monroe County Health Department, Rochester, New York, USA; #Oregon Department of Human Services, Portland, Oregon, USA; **Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA; ††California Emerging Infections Program, Oakland, California, USA; ‡‡Connecticut Emerging Infections Program, Department of Public Health, Hartford, Connecticut, USA

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Table 2

Comparison of percent of Streptococcus pneumoniae isolates nonsusceptible to third-generation cephalosporins by site: active surveillance (ABCs) versus antibiograms

Site Antibiogram ABCs Difference in % nonsusceptible (antibiograms vs. ABCs)
No. laboratoriesa Non-susceptible isolates Total no. isolates tested % non-susceptible No. laboratories Non-susceptible isolates Total no. isolates tested % non-susceptible
Tennessee 10 54 357 15.1 31 114 440 25.9 –10.8
New York 3 2 84 2.4 20 5 69 7.2 –4.8
California 4 14 412 3.4 10 15 184 8.1 –4.7
Connecticut 5 19 267 7.1 32 73 624 11.7 –4.6
Oregon 6 34 419 8.1 15 14 178 7.9 0.2
Maryland 5 53 476 11.1 27 48 557 8.6 2.5
Minnesota 7 104 543 19.2 25 60 435 13.8 5.4
Georgia 14 222 1272 17.5 39 102 850 12.0 5.5
Total 54 502 3,830 13.1 199 431 3,337 12.9 Median: –2.25

aOnly laboratories whose antibiograms covered the calendar year in question (1997 for all sites except NY [1998]) were compared to ABCs.

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