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Table 3 Susceptibility profile of GBS isolates by E test (n = 128)

From: Antibiotic resistance of Streptococcus agalactiae isolated from pregnant women in Garankuwa, South Africa

Antibiotic MIC (µg/ml)
Range 50 % of isolates 90 % of isolates Break pointa (susceptible) % Of isolates resistant
Penicillin 0.002–32 0.012 0.047 ≤0.12
Erythromycin 0.016–256 0.16 8 ≤0.25 21.1
Clindamycin 0.016–256 0.16 8 ≤0.25 17.2
  1. aCLSI guidelines 2012