Sample Dilution Concentration of tetracycline (m/ml) No. of Colony No. of Bacteria/ml 1 10-4 10-4 10-4 30 60 100 33 11 3 33×10-4 11×10-4 3×10-4 2 10-4 10-4 10-4 30 60 100 53 24 6 53×10-4 24×10-4 6×10-4 3 10-4 10-4 10-4 30 60 100 91 33 11 91×10-4 33×10-4 11×10-4 4 10-4 10-4 10-4 30 60 100 102 43 13 102×10-4 43×10-4 13×10-4

Table 5: Bacterial count (dilution 10-4) with different concentration of tetracycline.