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Growth and performance of broiler breeders fed bacitracin methylene disalicylate and zinc bacitracin
Publikováno v:
Poultry science. 70(7)
Day-old Cobb broiler breeder pullets were randomly allotted into 20 floor pens where they were brooded and reared to 23 wk of age. Eight pens received a control diet containing no growth promotant. The other 12 were fed 55 mg of bacitracin methylene
Autor:
E. L. Stephenson, R. V. Fell
Publikováno v:
Poultry Science. 32:1092-1093
Elam et al. (1951) reported that growth responses in chicks were obtained by injection of penicillin which had been autoclaved in aqueous solution. They obtained no response when autoclaved penicillin was fed orally. In earlier work with penicillin,