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Black's veterinary dictionary 21st edition - U

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Từ điển thú y vần U | U wounds irritation from badly fitting harness pressure of bony prominences upon hard floors insufficiently provided with bedding and application of too strong antiseptics to wounds. Udder see MAMMARY GLAND Uitpeuloog Bulging eye disease an oculovascular myiasis of domestic animals in South Africa. Ulcer A break on the surface of the skin or of any mucous membrane of a cavity of the body which does not tend to heal. The process by which an ulcer spreads which involves necrosis death of minute portions of the healthy tissues around its edges is known as ulceration. Most ulcers are suppurative bacteria prevent healing and often extend the lesion. An ulcer consists of a floor or surface which in consequence of the loss or destruction of tissue is usually depressed below the level of the surrounding healthy structures and an edge around it where the healthy tissues end. Callous ulcer is a type of chronic ulcer often encountered in horses and dogs when there is any pressure or irritation that interferes with the blood supply but does not necessarily cause immediate destruction of the skin. In most cases it is covered by a hard leathery piece of dead skin from under which escapes a purulent fluid. Bedsores in all animals may be of this nature. Rodent ulcer is a term reserved in human medicine for an ulcerating carcinoma of the skin but it is often colloquially used by dog-and cat-owners for an EOSINOPHILIC GRANULOMA. Skin cancer occurs in domestic animals and such malignant tumours may ulcerate. Tubercular ulcers may occur in dogs and cats skin in the form of raised plaques which ulcerate. Internal ulcers may occur in the mouth see MOUTH DISEASES OF in the stomach see GASTRIC ULCERS in the bowels see INTESTINES DISEASES OF and in other parts. Glanders ulcers are typically encountered in the mucous membrane of the nostrils and have a punched-out appearance. Lip-and-leg ulcers occur in sheep with ORF. Causes Any condition that lowers the general vitality of the animal such