Ergotism in Animals Quiz

Lameness = Fescue toxicosis Necrosis of tail, ears, and hoof tissue = Ergotism Erythema and swelling of the coronary region = Ergot toxicosis Agalactia and reduced lactation = Ergovaline toxicity

Early parturition for cattle and prolonged gestation in mares = Dopaminergic effect of ergovaline Temperature intolerance in high environmental temperatures = Inadequate prolactin due to ergovaline Weight loss and abnormal behavior = Fescue toxicosis Imbalances of progesterone and estrogen = Dopaminergic effect of ergovaline

High nitrogen applications enhance toxicity = Tall fescue Variation in infection level with the fungus leads to toxin variation = Kentucky-31 fescues Endophyte fungus N coenophialum synthesizes ergot alkaloids = Infected fescue Susceptibility of cattle is subject to individual variation = Tall fescue

<p>Initiates several physiologic abnormalities in animals = Agonist for dopamine D2 receptors Causes agalactia in horses and swine = Inhibition of prolactin secretion Reduces lactation in cattle = Inhibition of prolactin secretion Leads to temperature intolerance at high environmental temperatures = Disturbance of hypothalamic thermoregulatory center</p> Signup and view all the answers

<p>Produces ~90% of the ergopeptide alkaloids produced = Ergot alkaloid ergovaline Ranges from 100 to 500 ppb in infected tall fescue = Ergot alkaloid ergovaline</p> <blockquote> <p>200 ppb is considered a toxic concentration = Infected tall fescue 90% of ergovaline metabolites are found in urine of cattle = Endophyte-infected fescue</p> </blockquote> Signup and view all the answers