Probiotics in the Ration of Broiler Birds to Reduce Human Health Hazard

ABSTRACT: The study was conducted at Dr. Purnendu Gain Field Laboratory, Agrotechnology Discipline, Khulna University, Khulna during 28^th march to 1^st may 2014. The objective of this study was to formulate of broiler rations replacing antibiotics by probiotics. The study was conducted using day-old broiler birds and continues up to 35 days. Two hundred and forty day old broiler chicks (Cobb 500) were divided in to 4 treatment groups having 4 replications and number of chicks in each replication was 15. The 4 treatment groups were assigned randomly to 4 experimental diets. Experimental groups included control (no antibiotic/ probiotics), T₁ (antibiotic @40g/100kg feed), T₂ (probiotic @10g/100kg feed) and T₃ (probiotic @20g/100kg feed). The antibiotic was oxytetracycline and probiotics was a mixture of Saccharomyces cerevisiae type boulardii CN cm 1-1079: 2.0×10¹⁰ cfu/g. The result showed that the body weight at marketing (35 days) was maximum in T₁ (antibiotic @40g/100kg feed) group (1766.79g) and minimum (1585.95g) in T₂ (probiotic @10g/100kg feed) group. But it was almost similar body weight (1631.67g) of T₃ (probiotic @20g/100kg feed) group with T₁ (antibiotic @40g/100kg feed) group. The feed intake, feed conversion ratio, growth rate and feed cost were statistically non-significant (P>0.05) among the treatments and showed non significant variation. The mortality rate of the birds were maximum (3.34) in T₁ (antibiotic @40g/100kg feed) group and minimum (0.00) in T₃ (probiotic @20g/100kg feed) group. It can be concluded from the study that feed intake, feed conversion ratio, growth rate, feed cost were almost similar for different treatment groups. However, probiotic may be replaced @ 20g/100 kg feed for better survivability.

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