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Digital dermatitis is a disease that causes lameness in cattle. It was first discovered in Italy in 1974 by Cheli and Mortellaro. This disease is caused by a mixture of different bacteria. Anaerobic bacteria, including spirochetes of the genus Treponema, are found in the lesions associated with the infection.
Nasal signs may be prominent, with nasal discharge and stertorous respiration. Some animals also develop foot lesions, beginning with coronitis, with consequent lameness. In sheep, this can lead to knee-walking. In cattle, constant changing of position of the feet gives bluetongue the nickname the dancing disease. [12]
The acute phase is the first 72 hours following the initiation of clinical signs. Treatment response during this time determines if the horse will go into the subacute phase or chronic phase. Clinical signs at this time include bounding digital pulses, lameness, heat, and possibly response to hoof testing. [1] Subacute phase
Initially, signs of bone spavin may include sporadic and vague hindlimb lameness. Some horses may become uncomfortable in one lead, or may demonstrate stiffness walking downhill. In many cases lameness worsens, becoming more obvious and consistent. Advanced cases may have a bony swelling on the hock, typically on the inside of the joint.
In cow-hocked horses, the hind hocks are too close together and point toward each other, with the feet too widely apart. It is a fairly common defect, and if the metatarsal bones are vertical, may not always cause lameness. A combination of cow- and sickle-hocks poses a greater risk. [1]
Sheep may develop clinical signs, but this is also rare. [2] EHD is often called bluetongue, but this is incorrect. Bluetongue virus is closely related to EHDV, and has similar clinical signs, but it is a different disease. Bluetongue is a serious disease in cattle, as well as other ruminants, and can have a significant effect on international ...
In feedlot cattle, a diet containing a high proportion of cereal grain can lead to primary ruminal tympany. [5] The main signs of bloat in cattle are distension of the left side of the abdomen, dyspnea (difficulty breathing) and severe distress. If gas continues to accumulate, the right side of the abdomen may also become distended, with death ...
Additionally, nonspecific signs have also been observed which include weight loss, decreased milk production, lameness, ear infections and teeth grinding due to pain. Some animals may show a combination of these signs, while others may only be observed demonstrating one of the many reported.