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The effects on production efficiency of oleandomycin and oxytetracycline fed at low levels in the diet of heavy pigs

  • J. Vernon (a1), E. A. Mercer (a1) and G. D. Rosen (a2)


Results are presented of an investigation involving 328 pigs on 7 farms in East Anglia, on the effect of oxytetracycline (10 g./ton), oleandomycin (2·5 g./ton) and oxytetracycline (10 g./ton) plus oleandomycin (2·5 g./ton), on the live-weight gain, feed consumption and feed conversion efficiency of pigs from weaning to slaughter at approximately 260 lb. live-weight. Effects on number of days from weaning to slaughter and carcass characteristics are also given.

Both antibiotics gave significant improvements in daily live-weight gain (5·4% for OTC and 4·0% for OM) and feed conversion efficiency (3·9% for OTC and 2·3% for OM). There was a significant negative interaction between the antibiotics on live-weight gain from weaning to slaughter.

The average number of days from weaning to slaughter was significantly reduced by both antibiotics (5·8 days for OTC and 5·4 days for OM) and there was a significant interaction between antibiotics.

Feed conversion efficiency for all pigs was significantly better on those farms where antibiotics had not previously been used but the antibiotic treatment effects were the same in both categories of farm studied.



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Barber, R. S., Braude, R., & Mitchell, K. G., 1960. Further studies on antibiotic, copper and zinc supplements for growing pigs. Brit. J. Nutr., 14: 499.
Braude, R., Kon, S. K., & Porter, J. W. G., 1953. Antibiotics in nutrition. Nutr. Abstr. Rev., 23:473.
Braude, R., Wallace, H. D. & Cunha, T. J., 1953. The value of antibiotics in the nutrition of swine. A review. Antibiotics and Chemotherapy., 3: 271.
Brownlee, K. A., Delves, C. S., Dorman, M., Green, C. A., Grenfell, E., Johnson, J. D. A., & Smith, N., 1948. The biological assay of streptomycin by a modified cylinder plate method. J. gen. Microbiol., 2: 40.
Ferrando, R., & Theodossiades, G., 1960. The action of oleandomycin alone or admixed with terramycin on the growth rate of pigs. Proc. Pfizer Europe, agric. Res. Conf., Lucerne, 1960.
Grove, D. A., & Randall, W. A., 1955. Assay methods of antibiotics. Medical Encyclopedia, Inc.
Hawbaker, J. A., Diaz, F., Speer, V. C., Hays, V. W., & Catron, D. V., 1960. The effect of oleandomycin on the performance of the young growing pig. J. Anim. Sci., 19: 800.
Lloyd, L. E., Crampton, E. W., & Mowat, D. N., 1961. Effect of calcium:phosphorus ratio, oleandomycin and protein level on the performance of early weaned pigs. J. Anim. Sci., 20: 176.
Lucas, I. A. M., 1957. Antibiotic supplementation in rations for pigs. Vet. Rec., 69: 233.
Lucas, I. A. M., & Calder, A. F. C., 1957. Antibiotics and a high level of copper sulphate in rations for growing bacon pigs. J. agric. Sci., 49: 184.
Magruder, D. A., Sherman, W. C., Reynolds, W. M., & Luther, H. G., 1958. A new antibiotic, oleandomycin, in swine rations. J. Anim. Sci., 17: 1177 (Soc. Proc.)
Ridgeon, R. F., 1960. Economics of pig production. School of Agriculture, Cambridge University. Farm economics branch. Report No. 52.

The effects on production efficiency of oleandomycin and oxytetracycline fed at low levels in the diet of heavy pigs

  • J. Vernon (a1), E. A. Mercer (a1) and G. D. Rosen (a2)


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