Table 1.

S. pneumoniae isolate penicillin and extended-spectrum cephalosporin resistance patterns

Penicillin interpretive category (MIC)No. of isolates with indicated phenotype
Cefotaxime (MIC)Ceftriaxone (MIC)
Susceptible (≤0.5 μg/ml)Intermediate (1.0 μg/ml)Resistant (≥2.0 μg/ml)Susceptible (≤0.5 μg/ml)Intermediate (1.0 μg/ml)Resistant (≥2.0 μg/ml)
Susceptible (≤0.06 μg/ml)75007500
Intermediate (0.12–1.0 μg/ml)44804570
Resistant (≥2.0 μg/ml)192622182821