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The value of virginiamycin (Eskalin) as a feed additive for growing pigs in diets with or without a high copper supplement

  • R. S. Barber (a1), R. Braude (a1), K. G. Mitchell (a1) and R. J. Pitman (a1)


In three trials, each involving 48 individually-fed pigs grown from 20 to 90 kg live weight, the value of virginiamycin as a performance-promoter either alone or together with 250 mg Cu/kg diet was examined. Both copper and virginiamycin on their own gave significant, although small, improvements in performance and the results suggested that there can be a degree of additive action between the two materials when both are added to the diet.



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Barber, R. S., Braude, R., Mitchell, K. G. and Cassidy, J. 1955. High copper mineral mixture for fattening pigs. Chemy Ind., p. 601.
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Braude, R. 1975. Copper as a performance promoter in pigs. In Copper in Farming. Proc. Symp. Copper Development Ass., London.
Meyer, H. and Krsger, H. 1973. [Feeding of copper to pigs.] Ubers. Tierernähr. 1: 944.
Rerat, A. 1971. [Growth characteristics and body composition of pigs as influenced by the addition of copper to their diets.] Annls Zootech. 20: 408409.
Wallace, H. D. 1967. High Level Copper in Swine Feeding. Int. Copper Res. Assoc.


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