Description    Prolonged ingestion of Bracken Fern (PTERIDIUM AQUILINIUM) causes bone marrow depression in cattle; sheep and goats are more resistant. Occurs sporadically where Bracken is widely available and other pasture is not. CHEILANTHES SIEBERI, known as mulga or rock fern, grows in Australia and produces a poisoning in cattle and sheep that is clinically and hematologically indistinguishable from bracken fern poisoning; in experimental poisoning animals developed signs about 3 weeks after the start of feeding trials.
Species   Bovine, Caprine, Ovine
Signs   Agalactia, Anorexia, Ataxia, Bloody stools, feces, hematochezia, Dark color stools, feces, Diarrhea, Dullness, Dysmetria, Epistaxis, Excessive salivation, Exercise intolerance, Fever, Generalized weakness, Head, face, ears, jaw, nose, nasal, swelling, Hematuria, Hemoglobinuria or myoglobinuria, Hemorrhage of any body part or clotting failure, Hyphema, Inability to stand, Melena or occult blood in feces, stools, Pale, Paraparesis, Petechiae, ecchymoses, purpura, Red or brown urine, Sudden death, Tachycardia, Tetraparesis, Underweight, poor condition, thin, emaciated, unthriftiness, ill thrift, Weak pulse, Weight loss
References   Payne J. Plant poisoning in farm animals. In Pract 2014;36:455 [Web Reference]
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]
Bell C. Bleeding disorders in cattle. In Pract 2011;33:106 [Web Reference]
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