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Relative percentage inhibition of different concentrations of ZnO-NPs (90 mg/ml) in combination with PGPR strains against bacterial pathogens strain of E. coli of colibacillosis disease. Details of strains are the same as given in Fig. 4. Different letters signify significant variations at LSD (P = 0.05), n = 3 and ± indicates standard error between three replicates.
