Efficacy of Probiotic (BioSAF۴۷) and Prebiotic (BioMos) on Physiological Performance of Broiler Chickens under Heat Stress Conditions

Prebiotic and probiotic products seem to have beneficial effects on the physiological performance of broiler chickens. This study aims to evaluate the effects of dietary supplementation of mannan-oligosaccharide prebiotic (Bio-MOS) and Saccharomyces cerevisiae probiotic (Bio-SAF۴۷), either alone or in combination, on some of the biological markers of heat stress in broiler chickens. ۳۰۰ one-day-old chicks (Cobb ۵۰۰) were randomly divided into five groups (n = ۱۲) with ۵ repetitions. All groups had access to a basal diet, and experimental groups each additionally received ۰.۰۵, ۰.۱, and ۰.۲ percent of their respective supplementation regimen in starter, grower, and finisher diets, respectively. Dietary supplementation of Bio-SAF۴۷ and Bio-MOS reduced (p < ۰.۰۵) the elevated serum corticosterone concentration during ۱-۲۱ and ۲۲- ۴۲ days of age, respectively. Combination of Bio-SAF۴۷ and Bio-MOS reduced (p < ۰.۰۵) the elevated serum corticosterone concentration and H/L ratio; while increasing (p < ۰.۰۵) the reduced IgG titer, bursa index, BWG, heterophil and lymphocyte count during ۳۵-۴۲ (finisher) days. Our results suggest that prebiotics and probiotics reduce the negative effects of heat stress in broilers and the combination of Bio-SAF۴۷ and Bio-MOS diet (synbiotic effect) was advantageous compared to the control diet with respect to feed efficiency. Moreover, separate supplementation of Bio-SAF۴۷ and Bio-MOS had a positive effect on serum corticosterone levels. These results emphasize the role of prebiotic and probiotic supplementation in improving physiological performance and open a new window to future studies.

کلیدواژه ها:

Heat stress ، Bio-SAF۴۷ ، Bio-MOS ، Immune system ، chicken