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Management - Disease interactions in pigs 3: Nutrition - disease interactions
Published online by Cambridge University Press: 22 November 2017
Extract
Both level of feeding and dietary composition have been demonstrated to influence bacterial colonisation and diarrhoea in the weaned pig (Smith & Hall 1968, Bertschinger et al 1978, Lecce et al 1983). Kenworthy and Allen 1966 proposed that “the stimulus to bacterial growth derives from the hosts response mechanisms to intestinal irritation” and that the enterotoxigenic E Coli “Acts as an exacerbating agent rather than a primary pathogen” (Kenworthy et al 1967).
Several workers have suggested that the primary intestinal response is villus atrophy, an elevation in crypt cell mitosis (by up to x10) and crypt cell hyperplasia, associated with malabsorption, mal-digestion and increased intra-epithelial lymphocytes. Such a response is characteristic of a T cell mediated type IV hypersensitivity (Ferguson 1980). Miller et al (1984) have therefore suggested that one of the factors which may contribute to the aetiology of postweaning diarrhoea is a transient hypersensitivity to dietary antigens prior to the development of oral tolerance.
- Type
- Management - Disease Interactions in Piglets
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- Copyright
- Copyright © The British Society of Animal Production 1988