| Autor: |
E.W. Fisher, IE Selman, A.D. McEwan |
| Rok vydání: |
1971 |
| Předmět: |
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| Zdroj: |
Research in Veterinary Science. 12:205-210 |
| ISSN: |
0034-5288 |
| DOI: |
10.1016/s0034-5288(18)34179-1 |
| Popis: |
SUMMARY The feasibility of producing uniform absorptions of immune lactoglobulin by newborn dairy calves was investigated using a standardised system of colostrum feeding and management. Five groups, each of 10 newborn calves, were fed pooled bovine colostrum at a fixed rate and at fixed times post partum. The serum concentrations of absorbed immune lactoglobulin at 48 hr. post partum were measured using the zinc sulphate turbidity test. It was found that within each group of 10 calves there was a marked uniformity in the 48-hr. serum concentrations of absorbed immune lactoglobulin. None of the 50 calves examined in these investigations was found to be unable to absorb immune lactoglobulin. Friesian-cross-Ayrshire calves were found to absorb significantly greater quantities of immune lactoglobulin than similarly treated Ayrshire calves, although the latter were more consistent absorbers. Exposing calves to low ambient temperatures did not depress their globulin absorptive efficiency. Mothered calves attained significantly higher 48 hr. serum concentrations of absorbed immune lactoglobulin than non-mothered control animals. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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