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Table 1 Serotypes and minimal inhibitory and bactericidal concentrations (MIC / MBC) of six antimicrobial agents against nine strains of Streptococcus pneumoniae

From: Optimization of culture conditions to obtain maximal growth of penicillin-resistant Streptococcus pneumoniae

Strains Serotype MIC / MBC [μg/mL] MIC* [μg/mL]
   PEN CRO VAN ERY CHL SXT
INS-E611 6B 2.00 / 2.00 1.00 / 1.41 0.35 / 0.35 0.03 32.00 4.00
INS-E674 14 2.00 / 2.00 1.00 / 1.00 0.25 / 0.25 0.06 4.00 8.00
INS-E676 14 1.00 / 1.41 1.00 / 1.41 0.35 / 0.70 0.06 4.00 8.00
INS-E678 14 0.12 / 0.12 0.03 / 0.03 0.25 / 0.25 0.06 4.00 16.00
INS-E682 6B 0.01 / 0.01 0.01 / 0.01 0.25 / 0.25 0.06 32.00 0.50
INS-E683 9V 1.00 / 1.00 0.35 / 0.35 0.35 / 0.35 0.06 4.00 32.00
INS-E684 14 1.00 / 1.00 0.50 / 0.50 0.25 / 0.25 0.13 4.00 1.00
INS-E685 1 0.01 / 0.01 0.01 / 0.01 0.25 / 0.25 0.06 2.00 0.50
ATCC 49619 19F 0.46 / 0.46 0.06 / 0.12 0.33 / 0.44 0.06 4.00 0.25
  1. PEN = penicillin; CRO = ceftriaxone; VAN = vancomycin; CHL = chloramphenicol; ERY = erythromycin; SXT = trimethoprim-sulfamethoxazole (only first component values shown)
  2. * MIC determined by Instituto Nacional de Salud (INS), Bogotá, Colombia.
  3. Breakpoint for penicillin-susceptible strains: MIC ≤ 0.06 μg/mL.