Proteinograma sérico de bezerros holandeses do nascimento até um ano de vida* Blood serum proteinogram of holstein calf from birth until one year old

In an attempt to determine proteinogram from newborn calves submitted to natural suckling of colostrum and from calves before and after parturition, 40 newborn Holstein calves were studied from birth to one year. Except for alpha globulin, the lgG, lgM total protein and other protein fractions changed with age. Total protein increased from birth to 48 hours of age; reduced until 30 days and finally increased until one year of age. Albumin was the principal protein of serum before colostrum intake, and after 48 hours of age albumin leveis raised untill 365 days of life. There was a gradual increase in betaglobulins leveis in the first 96 hours after colostrum intake, and after that there were little fluctuations in its leveis. At the time of birth, leveis of gamma globulin and immunoglobulins G and M were low, raising 6 to 24 hours after colostrum suckling. Then, those leveis reduced until 30 days of life, when they began to increase slowly until one year of age.