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
)
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.