Contributions to the Knowledge of Immunoglobulin Type IgG Concentration Evolution in Colostral Milk
Keywords:
colostrum, immunoglobulin type IgG, Romanian Black and White breedAbstract
The aim of the paper was to study the evolution of the immunoglobulin type IgG concentrations during the first three days postpartum in Romanian Black and White cows. Researches were carried out on five Romanian Black and White primiparous cows. Samples of colostrum were collected at calving and at 4-hour interval for three days. Samples were analyzed for immunoglobulin concentration using ELISA test. The colostrum was analized in order to mesure immunoglobulin type IgG concentrations. The maximum concentration of immunoglobulin Ig G in colostral milk was found as expected at the first milking 44.2 mg/ml. At the third, fourth, fifth and sixth milking from the second day after calving, respectively at 36, 40, 44 and 48 hours after calving immunoglobulin type Ig G concentration decreased to 32.8, 31.1, 29.6 and 26.8 mg/ml. At the sixteenth, seventeenth, and eighteenth milking from the third day after calving, respectively at 64, 68, and 72 hours after calving immunoglobulin type Ig G concentration decreased to 22.6, 17.5, and 15.3 mg/ml.
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