Poisonous Plants

Question 1

Bracken fern
Causes ____ in _____ species

How long can it take to show clinical signs?

Answer 1

Bone marrow suppression in ruminants

Can take up to 3 months to show signs

Question 2

Moldy sweet clover
What does it cause?
Over what period of time?

Answer 2

Coagulopathy via Vit K anatagonism

Long periods of time

Question 3

Ragwort
What does it cause

What other toxic plants are similar?

Answer 3

Pyrrolizidine alkaloid

Causes liver disease over several months

Fiddleneck, senecio

Question 4

Gossypol toxicity

Answer 4

Causes sudden death from cardiomyopathy and/or hepatopathy in ruminants

Question 5

Lupine
What does it cause in cattle?
What species is most affected?
Classic lesions

What other plants are similar to lupine?

Answer 5

Causes teratogenesis in cattle
Sheep are most affected with neuro signs

Arthrogryposis (crooked calf) or cleft palate

Tobacco, locoweed and poison hemlock

Question 6

Veratum Californicum (aka false hellebore or corn lily)
What does it do?
What species is most affected

Answer 6

Is a teratogen that causes birth defects in fetal lambs

Question 7

Milkweed

Answer 7

Cardiac glycoside

Causes acute clinical signs and death

Question 8

st. johns wort

Answer 8

causes photosensitization, conjunctivitis, sloughed skin and icterus in horses

Question 9

blue green alga

Answer 9

causes sudden death

Question 10

slaframine

Answer 10

hypersalivation