Inoculum volume (%v/v) Antibacterial activity (inhibition zone in mm)
  Bacillus pumilus Aeromonas formicans 
2.5 16.0 ± 0.29 17.2 ± 0.15
5.0 22.0 ± 1.00 23.5 ± 0.50
10.0 20.5 ± 1.00 22.5 ± 0.50
15.0 20.2 ± 1.76 22.3 ± 0.58
20.0 19.5 ± 1.80 20.8 ± 0.76
25.0 18.7 ± 1.15 20.1 ± 0.76
30.0 17.8 ± 1.04 18.8 ± 1.04
Table 8: Determination of optimum inoculum volume for antibiotic production by cup-plate method.