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Clinical findings and diagnosis of thrombosis of the caudal vena cava in cattle

This paper describes the causes, clinical findings and diagnosis of caudal vena caval thrombosis in cattle. Occlusion of the vein is caused by a ‘white’ thrombus, and typical clinical signs include chronic weight loss, poor general condition and intermittent fever. Most affected cattle have respiratory signs; in some, pulmonary haemorrhage, ascites and sudden death occur.

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HERD-BASED DIAGNOSIS OF SUBACUTE RUMINAL ACIDOSIS

Subacute ruminal acidosis is a common health and production problem in the cattle industries of the United States. It is a risk wherever cattle are fed diets rich in starch in order to achieve high rates of growth or milk production. For a variety of reasons, subacute ruminal acidosis has been a difficult diagnosis to make in the field. Foremost, the absence of specific diagnostic tests has made the diagnostician dependent on recognizing the syndrome of characteristic secondary clinical signs within the herd.

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