Title: Hyperkeratosis of the rumen in disturbances of fermentation
Abstract: Hyperkeratosis appearing in primary changes of the mucaosa of the rumen was dealt with in the papers written by Jensen et al. in the fifties, in which a relationship was established between rumen acidosis due to disturbances of fermentation and rumenitis. This condition brings the mucosa into typical relief and is believed to be a factor in the diffusion of volatile fatty acids. The outstanding feature is the thickening of the stratum corneum. Growing ruminants also show developmental anomalies consisting of ridges bearing branched papillae. The disturbances of diffusion are due to the particular arrangement of the epidermis on the one hand and to the mitogenic effect of fatty acids in the cells of the stratum basale on the other. This results in the appearance of a large number of cells which undergo a process of increased keratinization during growth into the stratum spinosum. The flow through the intercellular lacunar system stagnates, and therefore also the diffusion of materials from the rumen fluid through the basal cells. In addition to the effect on the epidermis, the subjacent lamina propria is affected during the process of keratinization. This results in delayed enlargement of the surface area of the rumen. This does not occur when keratinization is induced during the lactation period. Though hyperkeratosis is the most important, it is not the only disorder of the ruminal mucosa in disturbances of fermentation.
Publication Year: 1981
Publication Date: 1981-01-01
Language: en
Type: article
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