Performance of Resistant and Non-Resistant Calves during Repeated Infection with Cooperia spp. and Ostertagia spp. and Mixed Species
An experiment was carried out to examine the significance of resistance to Cooperia spp. for the weight gain performance of calves under conditions of severe re-infection with several species. Part of the variation in weight gains could be explained by variation in resistance. Resistant animals that showed a transient growth-depression after primary infection, ultimately performed better.
KeywordsWeight Gain Antibody Titre Primary Infection Growth Depression Infected Calf
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