Thiaminase-containing Plants
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Created by:
FeralAtheist on October 12, 2011
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11 terms
Terms | Definitions |
|---|---|
 What plants contain thiaminase? | Brackenfern (Pteridium) Horsetail (Equisetum) |
| What species are primarily affected by Brackenfern (Pteridium)? | Horses and Cattle |
| What is the toxic principle of Brackenfern (Pteridium) in cattle? | Ptaquiloside |
| What are the signs/syndromes associated with ptaquiloside toxicosis in cattle? | bladder cancer - bovine enzootic hematuria bone marrow suppression - radiomimetic dz |
| Ddx of brackenfern in cattle? | anaplasmosis, leptospirosis, moldy sweet clover, septicemia |
| What is one important treatment of brackenfern poisoning in cattle? | blood transfusion |
| What is the toxic principle of brackenfern (pteridium) in horses? | thiaminase |
| What is the mechanism of action of thiaminase in the horse? | decreased absorption of thiamine, leading to decreased thiamine in the blood and decreased ATP |
| What is a key clinical sign of thiaminase/brackenfern toxicosis in the horse? | CNS dysfuction = bracken staggers |
| What is the toxic principle of Horsetail (Equisetum)? | Thiaminase |
| What is a treatment for thiaminase toxicosis in horses? | thiamine |
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