TAILIEUCHUNG - Black's veterinary dictionary 21st edition - W

Từ điển thú y vần W | W Walkabout Disease see KIMBERLEY HORSE DISEASE Wall Eye Leukoma Wall eye leukoma is a condition in which the brown pigment of the iris is lacking giving the iris a steely blue appearance. In dogs it is usually unilateral and is not a problem. In the horse wall eyes may occur when the greater part of the face or that portion around the eyes is white. The pupil of the eye appears to be encircled by a ring of bluish or greyish white and the expression of the horse s face is consequently unusual. It is not a serious defect except in tropical countries. Wallabies Smaller than kangaroos these native Australian marsupials are a source of human HYDATID DISEASE in the southern tablelands of New South Wales. Lumpy jaw is a common finding. They may sometimes be found as feral animals in parts of England. Warble Fly Order The Warble Fly Order came into force in 1989. The presence of warble fly lesions in cattle is a NOTIFIABLE DISEASE in Britain. Where a blood test indicates that an infestation may be present treatment under the supervision of an officer of the State Veterinary Service is required. Every herd and every bovine animal within 3 km of an infestation must be treated the fly The life-cycle of the warble fly. Warbles 769 Dressing against warbles. is able to travel only short distances . As warble flies are present in other countries all cattle imported into Britain must be treated for possible infestation within 24 hours of arrival. The treatment must be supervised by a State Veterinary Service officer. Warbles Warbles are swellings about the size of a marble or small walnut occurring upon the backs of cattle in spring and early summer caused by the presence in them of the larvae of one of the warble flies - Hypoderma bovis or H. lineata. These are of very great economic importance. The adults - especially H. bovis - cause great annoyance to stock during the period when eggs are being laid. Not only does this result in injuries animals rushing around gadding to .

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