Enzootic calcinosis was diagnosed in sheep in Uruguay in pastures containing the plant Nierembergia rivularis. In a flock of 200 sheep, 20 were affected and 12 died. Clinical signs were anorexia, weight loss followed by cachexia, stiffness, and kyphosis. At necropsy and histologic examination,
Enzootic calcinosis (EC), is a chronic disease, caused by toxic plants, which has mainly affected ruminants for more than 100 years. It is characterized by a soft tissue calcification, hypercalcemia, hyperphosphatemia, hypoparathiroidism, hypercalcitoninism, osteonecrosis, and osteopetrosis. The
The lungs of three sheep with spontaneous enzootic calcinosis induced by the calcinogenic plant Nierembergia veitchii (Nv) were examined electron microscopically and immunohistochemically. The main ultrastructural changes were activation of fibroblasts and modified smooth muscle cells (SMCs) in the
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