Fig. 5. Bactericidal efficacy of MEL@AgNPs, MEL@ZnONPs and Ag–ZnO/MEL/GA nanocomposite against (a) E. coli (b) S. enterica (c) B. cereus (d) S. aureus and (e) inhibitions zone of MEL@AgNPs, MEL@ZnONPs and Ag–ZnO/MEL/GA nanocomposites against bacteria. Different letters in each column refer significant differences (P < 0.05).