Figure 4.

Determination of zone of inhibition (ZOI) for ZO and AZO samples against (a) E. coli and (b) S. aureus. (i), (ii), (iii), and (iv) represents ZO, AZO, erythromycin (Ery) and deionized water (DW), respectively. Diameter of ZOI measured by ruler is shown in Table 1 (average from n = 3).