Table 1

Plaque diameter in the presence of different concentrations of various antibiotics

AntibioticMean plaque diameter (mm) ± SD (fold increase over control) with indicated concn (μg/ml) of antibiotica
00.1250.250.5124
DLAb1.12 ± 0.15
AmpicillinNDND1.12 ± 0.181.38 ± 0.191.51 ± 0.191.53 ± 0.21
AmikacinNDND1.12 ± 0.181.31 ± 0.191.34 ± 0.16ND
TelithromycinND1.14 ± 0.171.62 ± 0.16 (1.45)1.83 ± 0.14 (1.64)2.31 ± 0.10 (2.07)2.91 ± 0.28 (2.60)
ClarithromycinND1.38 ± 0.292.16 ± 0.20 (1.93)2.57 ± 0.20 (2.23)3.07 ± 0.12 (2.75)3.25 ± 0.15 (2.91)
CiprofloxacinND1.21 ± 0 0.201.32 ± 0.191.50 ± 0.147NDND
ChloramphenicolNDNDND1.29 ± 0.181.35 ± 0.171.53 ± 0.15
Tetracycline1.80 ± 0.14 (1.61)2.66 ± 0.14 (2.40)3.18 ± 0.28 (2.88)NDNDND
Linezolid1.37 ± 0.10 (1.22)2.05 ± 0.18 (1.83)2.81 ± 0.13 (2.52)2.85 ± 0.17 (2.56)3.90 ± 0.20 (3.48)ND
  • a Plaque diameter values are the means ± standard deviations of 20 different plaques. ND, not done.

  • b DLA, double-layer agar technique.