TABLE 2.

Susceptibilities of 145 S. pneumoniae isolates to 17 antimicrobial agents

AgentMIC% of isolates susceptible or resistanta
Range50%90%SIR
Penicillin0.03-40.25239.337.923.0
Cefditoren0.06-10.250.5c
Cefotaxime0.06-20.25182.113.84.1
Cefepime0.5-2<0.5254.537.28.3
Chloramphenicol4-16<4868.331.7
Erythromycin0.06-648>6415.24.180.7
Clarithromycin0.06-644>6420.07.672.4
Clindamycin0.06-64<0.06>6450.30.749.0
Levofloxacin0.25-811100
Meropenem0.12-2<0.120.582.117.9
Rifampin1-4<1100
Tetracycline0.5-4>4>412.41.486.2
Trim/Stb0.5/9.5-4/76<0.5/9.51/1971.724.83.5
Vancomycin0.12-10.50.5100
  • a S, susceptible; I, intermediate; R, resistant.

  • b Trim/St, trimethoprim and sulfamethoxazole. Ratio of concentrations of trimethoprim and sulfamethoxazole, 1:19.

  • c —, no NCCLS breakpoints were available.