Skarda J, Markalous E, Slaba J, Krejcí P, Skardová O, Zedník J
Institute of Animal Physiology and Genetics, Czechoslovak Academy of Sciences, Prague.
J Dairy Res. 1992 Nov;59(4):499-506. doi: 10.1017/s0022029900027163.
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.
在产后40 - 94天，以14天的间隔，通过在缓释载体中注射重组蛋氨酰牛生长激素（bST），14个牛群中的奶牛产奶量提高了3.8% - 32.1%。结果发现，在转为放牧春季牧场的奶牛中，经产奶牛比初产奶牛的反应更大。注射重组bST后，血浆bST在最初9天内升高。呼吸、心率和体温等临床特征不受bST治疗的影响，血液红细胞和白细胞计数、血红蛋白浓度和血细胞比容值也不受影响。血浆中的葡萄糖、游离脂肪酸、尿素和磷水平，以及血清丙氨酸氨基转移酶和天冬氨酸氨基转移酶不受bST治疗的影响，且未检测到丙酮。未发现bST对总体健康、乳腺感染状况、乳腺炎发病率和繁殖有不良影响。
