Efficacy of zinc oxide and copper oxide nanoparticles on virulence genes of avian pathogenic E. coli (APEC) in broilers

Table 3 The inhibition zone diameters of AG-Cu NPs on isolated E. coli strains

Strains	Inhibition zone diameters in millimeter at various AG-Cu NPs concentrations
Strains	20 mg/ml	40 mg/ml	60 mg/ml	80 mg/ml	100 mg/ml
O17	19.66 ± 0.33 ^a	20.00 ± 0.00 ^a	20.00 ± 0.00 ^a	22.33 ± 0.33 ^b	25.00 ± 0.00 ^c
O78	17.00 ± 0.57 ^a	18.00 ± 0.00 ^a	20.00 ± 0.00 ^b	22.00 ± 0.57 ^c	24.00 ± 0.57 ^d
O91	16.66 ± 0.33 ^a	17.00 ± 0.00 ^a	18.33 ± 0.33 ^b	21.00 ± 0.00 ^c	22.33 ± 0.33 ^d
O121	18.00 ± 0.00 ^a	19.00 ± 0.57 ^a	21.66 ± 0.33 ^b	22.00 ± 0.00 ^bc	23.00 ± 0.57 ^c
O159	16.33 ± 0.33 ^a	18.00 ± 0.00 ^b	18.00 ± 0.57 ^b	20.33 ± 0.33 ^c	21.00 ± 0.57 ^c

The various letters in the same row indicate statistically significant differences when (P < 0.05) (Mean ± SE) n = 3

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