Carbon source
(1.0 %w/v)
Antibacterial activity
(inhibition zone in mm)
  Bacillus pumilus Aeromonas formicans 
Sucrose (control) 14.0 ± 0.87 16.9 ± 0.29
D-glucose 14.5 ± 0.50 19.0 ± 0.50
Starch   9.2 ± 0.36 10.3 ± 0.72
Lactose 11.8 ± 1.04 17.5 ± 0.50
Fructose 13.2 ± 0.76 16.8 ± 0.29
Table 3: Selection of suitable carbon source for antibiotic production by cup-plate method.