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  • Title: [Examination of the total protein concentration and gamma-glutamyltransferase (gamma-GT) in calves during the first 14 days of life and their significance for predictions of health status in the first two postnatal weeks].
    Author: Steffen S, Tietz G, Grunert E.
    Journal: Dtsch Tierarztl Wochenschr; 1997 Aug; 104(8):272-6. PubMed ID: 9324451.
    Abstract:
    The objective of the present paper was to examine the development of the total protein concentration in blood serum and the gamma-GT activity in 49 calves in relation to the health status during the first 14 days of life. For this purpose, blood samples were taken immediately after birth of the animals, after 6, 12, 18 and 24 hours and from then onwards once a day with the calves being subject to a thorough clinical examination each time. All calves received pooled colostrum. At the end of the experiment, the calves were subdivided into three groups on the basis of their health status, i.e. control calves, calves with a slight or moderately severe disease and calves suffering from a severe disease. In all three groups the total protein concentration increased significantly after the colostrum intake and decreased slowly from the 2nd day of life onwards. The gamma-GT activity as well increased significantly after the colostrum intake and decreased rapidly after 12th hour of life and progressively in the further course of the experiment. Both parameters varied considerably from one calf to the next and no statistically significant differences in these parameters between the three groups could be found. It can thus be deduced that the total protein concentration in blood serum and the gamma-GT activity do not allow any predictions about the development of the health status during the first 14 days of life to be made.
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