TABLE 3.

Effects of antioxidants on the diameters of the zone of inhibition produced by nonfluoroquinolone antibiotics

Antibiotic spotted on the diskConcn (ng)Diam of zone of inhibition (mm) (mean ± SD)a
Control+Glutathione (10 mM)
Ampicillin2,0008.54 ± 0.538.54 ± 0.42
1,0006.22 ± 0.146.08 ± 0.15
Chloramphenicol2,00014.26 ± 1.0214.51 ± 0.17
1,00012.13 ± 0.1412.38 ± 0.13
Tetracycline2,00015.02 ± 0.3915.95 ± 0.36
1,00014.37 ± 0.9314.20 ± 0.81
  • a These values are not statistically different from the values for the corresponding values (P = 0.05).