Novoa-Garrido, Margarita; Aanesen, Lise; Lind, Vibeke; Larsen, Hans J.S.; Govasmark, Espen and Steinshamn, Håvard (2012) Immunological effects of feeding different sources of vitamin E and seaweed in a sheep herd during the winter season. In: Rahmann, Gerold and Godinho, Denise (Eds.) Ressortforschung für den Ökologischen Landbau 2008, Johann Heinrich von Thünen-Institut - Bundesforschungsinstitut für Ländliche Räume, Wald und Fischerei, Braunschweig, Germany, Agriculture and Forestry Research, Special Issue No. 362, no. 362, pp. 207-210.
In winter fed organic raised sheep inadequate plasma vitamin E levels is common and therefore
supplementation is recommended. The objective of the present work was to test the supplementation
of natural vitamin E and seaweed meal on the immune status of ewes and their offspring.
Forty Norwegian White Sheep ewes were randomly allocated to three supplementation treatments:
natural vitamin E, synthetic vitamin E, seaweed meal, and control. The feeding experiment lasted
the entire indoor feeding period. Ewes and newborn lambs were vaccinated against different environmental
microorganisms and pathogens. Different immunological parameters were measured.
Supplementing the ewes with natural vitamin E had positive effect on immunity against Mycobacterium
bovis in lambs. Seaweed, on the other hand, had negative effect on the passive transfer of maternal
antibodies in lambs the first week after birth. The adaptive immunity was not affected by
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