Pneumococcal Susceptibilities: US 1996-97

% Susceptible (NCCLS breakpoints)

Pen S Pen I Pen R

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

Amoxicillin 99.9 83.9 10.5

Amox-Clav 99.9 77.9 0.8

Cefuroxime 99.1 46.8 1.7

Cefotaxime 99.9 85.3 5.9

Ceftriaxone 99.9 85.8 10.1

Erythromycin 93.5 61.9 30.7

Azithromycin 93.7 64.2 31.2

Clarithromycin 93.7 61.9 31.6

Thornsberry et al. AAC 1999;43:2612

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