BRIGHT BLINDNESS, BRACKEN POISONING IN SHEEP
 
Description    Progressive retinal degeneration in sheep has been caused by long-term ingestion of bracken, PTERIDIUM AQUILINUM. There is a pronounced tapetal hyperreflectivity in some affected sheep.
 
Species   Ovine
 
Signs   Abnormal pupillary response to light, Abnormal retinal reflectivity, Abnormal size of retinal vessels, Blindness, Dysmetria, Mydriasis
 
References   Cortinovis C. Epidemiology of intoxication of domestic animals by plants in Europe. Vet J 2013;197:163 [Web Reference]
Bischoff K. Toxic Plants of the Northeastern United States. Vet Clin N A Food Anim Pract 2011;27:459 [Web Reference]
Nicholson SS. Southeastern Plants Toxic to Ruminants. Vet Clin N A Food Anim Pract 2011;27:447 [Web Reference]
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