Pneumococcal Susceptibilities: US 1998 CDC – 7 Cities – 16.5 million population

% Susceptible (NCCLS breakpoints)

Pen S Pen I Pen R

(n=820) (n=218) (n=238)

Levofloxacin 99.1 99.7 99.3

Chloramphenicol 99.6 93.3 85.3

Clindamycin 99.5 89.3 87.8

Rifampin 99.8 100 99.8

Synercid? 100 99.4 99.8

Vancomycin 100 100 100

Whitney et al. NEJM 2001;343:1917

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