HELICHRYSUM POISONING IN RUMINANTS
 
Description    African plants of the genus HELICHRYSUM have been associated with outbreaks of blindness and encephalopathy in ruminants. There is status spongiosis of the white matter of the brain and spinal cord; some animals develop degenerative retinopathy.
 
Species   Bovine, Caprine, Ovine
 
Signs   Abnormal pupillary response to light, Ataxia, Blindness, Cataract, Circling, Diarrhea, Dullness, Dysmetria, Dyspnea, Generalized lameness or stiffness, Generalized weakness, Inability to stand, Increased respiratory rate, Mydriasis, Nystagmus, Opisthotonus, Paraparesis, Polydipsia, Polyuria, Rumen hypomotility or atony, Tachycardia, Trembling, Tremor
 
References   van der Lugt JJ. Status spongiosis, optic neuropathy, and retinal degeneration in helichrysum argyrosphaerum poisoning in sheep and a goat. Vet Pathol 1996;33:495 [Web Reference]
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