Abstract
Abstract The current study aimed to estimate the total protein levels in Santa Ines ewes’ colostrum and in lambs’ blood serum by digital refractometry to determine the transfer of passive immunity to lambs under farm conditions. Nineteen ewes and 29 lambs were used. Ewes’ colostrum and lamb blood serum samples were collected at 6, 12, 24 and 48 hours postpartum to measure the total serum protein by digital Brix refractometer. The confirmation of lambs immunological status was performed by the zinc sulphate turbidity (ZST) test on blood samples collected from lambs 12 and 24 hours postpartum. Total protein concentration in colostrum significantly decreased between 6 and 12 hours postpartum (p
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