Effect of supplementing broiler chicken diets with green tea extract on the growth performance, lipid profile, antioxidant status and immune response

Abstract

A trial was conducted to explore the effect of feeding graded concentrations of green tea extract (GTE; 125, 250, 500, 1000 and 2000 mg/kg) on the growth performance, serum lipid profile, liver glutathione-reduced, thigh muscle malondialdehyde and humoral immune response against Newcastle disease virus vaccines of broiler chickens from hatching to 42 d of age. The results of broilers fed on GTE were contrasted to those fed on butylated hydroxytoluene (BHT; 125 mg/kg) or unsupplemented controls. The obtained results revealed no significant difference among treatments in the measured growth performance parameters (body weight, average daily gain, average daily feed intake and feed conversion ratio), per cent liveability and serum lipid profile (total lipid, total cholesterol, high-density, low-density and very low-density lipoprotein cholesterols). Dietary intake of GTE resulted in a significant increase in the liver glutathione-reduced level compared to the control. The glutathione-reduced level of broilers fed on the BHT diet was not significantly different from that of broilers fed on GTE or control diets. Feeding GTE or BHT resulted in a significant decrease in the malondialdehyde level of meat tissue. The specific antibody titre against Newcastle disease virus vaccines was significantly increased at 28 and 35 d of age in broilers fed on diets supplemented with GTE but not with BHT. In conclusion, GTE was found to possess antioxidant and immunostimulant characteristics for broilers when supplemented to their diets, and its optimum inclusion level ranged from 125 to 500 mg/kg.

Comparative effects of Chinese green tea (Camellia sinensis) extract and powder as feed supplements for broiler chickens

“…Green tea supplementation has been shown to improve body weight gain in broilers (Biswas and Wakita 2001) and pigs (Hossain et al 2012). The beneficial effects of GT by-products (Yang et al 2003;Cao et al 2005;), extract (Shomal et al 2012;Farahat et al 2016) and powder (Biswas and Wakita 2001;Alimohammadi-Saraee et al 2014) on performance and health of poultry have been reported. These effects of dietary green tea have been mainly attributed to its polyphenols (Ninomiya et al 1997;Gramza et al 2005;Khan 2014) which are reported to have antioxidant (Molan et al 2009;Sahin et al 2010) and antimicrobial (Jang et al 2007;Erener et al 2011;Khan 2014) activities.…”

Beneficial Effects of Green Tea Catechin on Veterinary Sciences and Bacterial Infections

“…Tea poly-phenols reduced glucocorticoid-induced growth inhibition and oxidative stress in chicken [36]. Tea poly-phenol was also effective to laying hens in the view point of anti-oxidant status, performance of reproduction and egg quality [37].…”

Peel meals as feed ingredients in poultry diets: Chemical composition, dietary recommendations and prospects

“…() reported a gallocatechin concentration of 160 mg/100 g dry weight of banana peel. Catechins are known to possess antioxidant (Gramza, Korczak, & Amarowicz, ; Sahin et al., ), antimicrobial (Friedman, ; Jang et al., ) and cholesterolemic (Farahat, Abdallah, Abdel‐Hamid, & Hernandez‐Santana, ; Yang et al., ) activities. These properties confer banana peel its strong antioxidant, cholesterolemic and antimicrobial activities (Zenab, Ayman, & Khalil, ).…”