Ruminant Nematode Flashcards
(26 cards)
Biggest economic loss.
Hot complex
Three spp. of the hot complex.
Haemonchus contortus, ostertagia ostertagi, trichostrongylus spp.
What is bottle jaw?
Thickened mandible area, lumpy jaw
Haemonchus contortus
Barberpole worm
Caused by decreased protein in blood.
Bottle jaw
Ostertagia ostertagi
Brown stomach worm
Mainly….
Cows, sheep, goat
Two types of strongyles of horses?
Small and large strongyles
Three years of large strongyles?
Vulagaris, edentatus, equinus
Travels to the arteries of horses that supply intestines with blood.
Strongylus vulgaris
Causes roughening of arterial walls and causing clots and cutting off blood supply.
Strongylus vulgaris
Affects the airways and bronchi of cattle.
Dictyocaulus spp.
Largest spp. In the trichostrongyle family.
Nematordius spp.
Horses usually develop immunity to this stongyle and mostly infects foals
Parascarsis equorum (roundworm)
Found in the abomasum.
Bankrupt worm (trichostrongyle spp.)
Can hibernate in the abomasum lining and are released in ideal conditions.
Ostertagia ostertagi
Causes bottle jaw.
Haemonchus contortus
Transferred through soul strum to foals.
Threadworms (strongyloides westeri)
Live in large intestine and cecum and are usually found on the skin.
Oxyuris equi (pinworm)
Makes horses itch their rump. “Brush bottle tail”
Oxyuris equi (pinworm)
A test to determine how many may be infecting the herd.
Eggs per gram test
Pasture management.
Rotating pasture, young animals in cleaner pastures, no overstocking
Rotating dewormers to minimize worm resistance and deworming the entire heard
Strategic deworming
Total economic loss of parasites annually
$100 million
