Fig 1. Antibacterial assay of the raw milk samples S1 and S2 against Bacillus subtilis using paper disc agar diffusion method.

(a) Antibacterial plate assay and (b) clear zone inhibition in mm. Values are means ± standard errors of three independent replicates (n = 3). Significantly difference at P < 0.05 was determined using analysis of variance. ND, not detected; Cont 1, disc dipped in sterile distilled water; Cont 2, disc dipped in pasteurized packet milk.