الفهرس 
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Abstract
This study was conducted to investigate the effect of zinc oxide nanoparticles (ZONPs)
on growth performance. A total of ninety-one-day old broiler chicks (ROSS 308) were on three
dietary treatments (T) with three replicates in each treatment. T1; basal diet + 40 mg/kg
inorganic ZnO, T2; basal diet + 40 mg/kg ZONPs, T3; basal diet + 80 mg/kg ZONPs. The results
showed significant increase (p<0.05) in the body weight gain and improved feed conversion ratio
in the groups fed 40 and 80 ZONP, but feed intake showed non-significant difference. The
activity of (SOD) and Catalase were significantly increased however; (MDA) was significantly
decreased in the same groups. Serum IgY also increased in the groups fed 80 ZONPs. Phagocytic
activity and lymphocytic proliferation test showed significant increase with ZONPs fed groups.
The villus height and crypt depth were significantly increased in all parts of the small intestine in
the groups fed 80 ZONPs. So, it could be concluded that dietary supplementation of 40 or 80 mg
ZONPs for broilers have beneficial effects on the growth performance, antioxidant status,
immunity, absorptive mechanism of broiler chickens.
Key words: Zinc oxide nanoparticles, Growth performance, Antioxidant status, Immunity status,
Absorptive capacity, Broiler chickens.