Comparison the effect of two multi-strain probiotics and antibiotic on growth performance, carcass characteristics, gastrointestinal microbial population and hematological indices of broiler chickens

Abstract

This experiment was conducted to evaluate the effect of two types of probiotic and antibiotic virginiamycin on performance, carcass characteristics, gastrointestinal microbial population and hematological indices of broiler chickens. Based a randomized completely design, three hundred day old Ross 308 broilers were reared for 42 day under 4 experimental treatments including a corn-soy basal diet as control treatment which was supplemented with antibiotic, fermented probiotic and commercial probiotic (Bipluse-2B^®). Five replicate were assigned to each dietary treatment. The results indicated that the use of antibiotic improved body weight gain and feed conversion ratio as compared to control and commercial probiotic treatments (P<0.05). Also, the use of fermented probiotic relatively improved body weight gain and feed conversion ratio as compared to control. Adding commercial probiotic to the basal diet increased the relative weight of gizzard than fermented probiotic and reduced the relative weight of abdominal fat pad than antibiotic treatment (P<0.05). Fermented probiotic supplementation significantly lowered the pH of ileum than those control and antibiotic treatments. Antibiotic virginiamycin and fermented probiotic were effective to reduce ileum coliforms population when compared to control and commercial probiotic treatments (P<0.05). The use of commercial probiotic reduced the blood concentration of cholesterol when compared to control birds The serum concentration of triglyceride and VLDL in birds under fermented probiotic significantly was lower compared to antibiotic treatment. According to the results of experiment, especially for body weight gain, Adding fermented probiotic in broiler chickens diet could be introduced as an effective alternative for antibiotics.