Effect of different conc. of CLf against E. coli and S. aureus.T0(1), Positive control: standard antibiotic (ampicillin and streptomycin); T1(2), Negative control (disc without Lf); T1, 1ppm; T2, 10 ppm; T3, 50 ppm; T4, 100 ppm; T5, 500 ppm; T6, 1000 ppm; T7, 2000 ppm; T8, 4000 ppm