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Abstract ▼ AI-Helper

In order to study the effects of probiotic and antibiotic on the performance of the chickens and the population of microfloras in the intestine, a feeding trial was conducted for a period of seven weeks. One hundred eighty hatched male chickens of layer attain were fed one of the following three exp...

In order to study the effects of probiotic and antibiotic on the performance of the chickens and the population of microfloras in the intestine, a feeding trial was conducted for a period of seven weeks. One hundred eighty hatched male chickens of layer attain were fed one of the following three experimental diets; nonmedicated control, antibiotic supplemented diet(virginiamycin 5 ppm) and probiotic supplemented diet. Birds fed probiotic supplemented diets were heavier and consumed more feed than those fed other diets but the differences were not statistically significant. Antibiotic supplemented group showed significantly (P〈0.01) better feed efficiency than other groups. Availabilities of dry matter, crude protein, crude fat, NFE, Ca and P were not significantly different between treatments but antibiotic supplemented group showed significantly(P〈0.05) lower availability of crude fiber than other groups. The weight of small intestine of the birds fed antibiotic supplemented diet was significantly (P〈0.05) lighter than those of other groups. The population of Bacillus subtilis and Lactobacilli in the intestinal content of the birds fed probiotic supplemented diet were significantly (P〈0.01) larger than those of other groups. On the other hand, the population of Coliforms in the probiotic group were significantly (P〈0.01) smaller than those in the nonmedicated control group.