Serum immunoglobulin levels in neonatal lambs.

The serum immunoglobulin levels of lambs were monitored 24 h post partum using the zinc sulphate turbidity test. There was a wide distribution in the level of circulating maternal immunoglobulin and quite a large proportion of lambs were hypogammaglobulinaemic. Mean levels were highest in single lambs and lowest in triplets.