The effect of yeast beta-glucan on respiratory brust of heterophils in broiler chickens

Subject Areas : Veterinary Clinical Pathology

علی  Kargary Rezapour ¹ (Assistant professor, Department of Animal Science, Faculty of Agriculture, Tabriz Branch, Islamic Azad University, Tabriz, Iran)
مهسا  Ali-Hossein Maslak, ² (Graduate of Agriculture, Faculty of Agriculture, Tabriz Branch, Islamic Azad University, Tabriz, Iran)
سجاد  Soleimany ³ (Graduate of Agriculture, Faculty of Agriculture, Kurdistan University, Sanandaj, Iran)
افشین  Zakeri ⁴ (Assistant professor, Department of Animal Science, Faculty of Agriculture, Tabriz Branch, Islamic Azad University, Tabriz, Iran)

Received: 2012-11-15 Accepted : 2012-12-31 Published : 2013-02-19

Keywords: Yeast beta-glucan, heterophil, Innate immunity system, Respiratory burst test,

Abstract :

The use of food additives to boost the immune system of broiler chickens is a new froutier for scientists. A factorial experiment based on completely randomized design was conducted to study the effects of the yeast beta-glucan on respiratory burst potential (nitro-blue tetrazolium test) of heterophils as an indicator of innate immunity in broiler chickens. This was done by using 162 one-day old broilers. Experimental factors were as following: beta-glucan levels (levels of 0, 0.04 and 0.08% of basal diet) and sex (male and female broilers). At the end of the study blood sample were taken from each replicate of every treatment and nitro-blue tetrazolium reduction test performed. The results showed that beta-glucan in a level of 0.04% of basal diet significantly increased nitro-blue tetrazolium reduction test of heterophils (p<0.05). The mean value of respiratory burst was also significantly higher in males compared to females (p<0.05). But, the interaction between two mentioned factors (beta-glucan and sex) was not statistically significant. Thus, considering the respiratory burst index, beta-glucan in a level of 0.04% of basal diet may improve innate immunity of broiler chickens.  

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