Fig. 3.

Effect of heavy metal on antibiotic resistance pattern of E. coli MRC11. R (resistant), I (intermediate) and S (sensitive) category as per CLSI criteria were labelled on each column. WM represented sensitivity in absence of heavy metal; C1, C2, C3 and C4 were concentrations of heavy metals in the medium, that were, Cd (175, 75, 50, 5 mg/L), Cu (250, 100, 50, 5 mg/L), Cr (125, 30, 15, 5 mg/L), Hg (15, 7.5, 1, 0.1 mg/L), Pb (250, 125, 75, 10 mg/L) and Zn (500, 250, 100, 50 mg/L) respectively. NG showed no growth of E. coli MRC11 isolate at that particular concentration of heavy metal.