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The Transfer of Antibodies from Ewes to Their Lambs

From the Agricultural Research Council, Animal Breeding Research Organisation, Edinburgh, Scotland

Abstract

Newborn lambs, unlike rats and mice, absorbed homologous agglutinins to Salmonella pullorum or Brucella abortus equally readily from colostrum. Agglutinins produced shortly after a first injection of B. abortus vaccine into ewes passed in relatively greater quantities into the colostrum than agglutinins of later immunization but lambs did not preferentially absorb agglutinins of either period. Treatment with 2-mercaptoethanol and anti-globulin tests reduced or increased the antibody titers of ewe and lamb sera by similar amounts. The results support the view that antibody absorption by the lamb is nonselective.