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Effect of methionyl bovine somatotropin in a prolonged-release vehicle on milk production, hormone profiles and health in dairy cows

Published online by Cambridge University Press:  01 June 2009

Josef Škarda ,
Evžen Markalous ,
Josef Slaba ,
Petr Krejčí ,
Olga Škardová  and
Jiří Zedník
Josef Škarda
Affiliation:
Institute of Animal Physiology and Genetics, Czechoslovak Academy of Sciences, 104 00 Prague 10-Uhříněves, Czechoslovakia
Evžen Markalous
Affiliation:
Insiituie of Animal Production, Prague 10-Uhříněves, Czechoslovakia
Josef Slaba
Affiliation:
Institute of Animal Physiology and Genetics, Czechoslovak Academy of Sciences, 104 00 Prague 10-Uhříněves, Czechoslovakia
Petr Krejčí
Affiliation:
Institute of Animal Physiology and Genetics, Czechoslovak Academy of Sciences, 104 00 Prague 10-Uhříněves, Czechoslovakia
Olga Škardová
Affiliation:
State Veterinary Institute, Prague 6-Lysolaje, Czechoslovakia
Jiří Zedník
Affiliation:
Central Agricultural and Testing Institute, Prague 1-Těšnov, Czechoslovakia
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Summary

Milk production of dairy cows in 14 herds was increased by 3·8–32·1% by the administration of recombinant methionyl bovine somatotropin (bST) in a sustained-release vehicle at 14 d intervals at 40–94 d post partum. A greater response in multiparous than in primiparous cows was found in cows turned out to graze spring pasture. Administration of recombinant bST resulted in elevated plasma bST during the first 9 d after injection. Clinical characteristics such as respiration, heart rate and body temperature were unaffected by bST treatment, as were blood erythrocyte and leucocyte counts, haemoglobin concentrations and haematocrit values. Plasma levels of glucose, free fatty acids, urea and P, and serum alanine aminotransferase and aspartate aminotransferase were not affected by bST treatment, and acetone was not detected. No adverse effects of bST on general health, infection status of mammary glands, mastitis incidence and reproduction were found.

Type
Original Articles
Information
Journal of Dairy Research , Volume 59 , Issue 4 , November 1992 , pp. 499 - 506
Copyright
Copyright © Proprietors of Journal of Dairy Research 1992

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