Ruminant GI Parasites Flashcards
Causes anemia and hyporoteinemia but not diarrhea in sheep and goats
Haemonchus contortus
Blood sucker of the abomasum in sheep and goats
Haemonchus contortus
What are clinical signs of Haemonchus contortus?
Chronic wt loss, poor doing, pale
Where do Haemonchus contortus live?
Abomasum
How do you treat Haemonchus contortus?
Fenbendazole
Young animals w/profuse watery D+, anorexia, wt. loss, and dehydration
Nematodirus
What other parasite concides w/coccidiosis season in the spring?
Nematodirus
What do Nematodirus eggs look like?
Ellipticals w/curved poles and 2-8 blastomeres
What is the roundworm of ruminants?
Ostertagia ostertagii
When does type 1 O. ostertagii occur?
Winter and spring from L3 in contaminated pastures
When does type 2 O. ostertagii occur?
Autumn to winter b/c inhibited L4 emerge
Where do O. ostertagii live?
Abomasum
What clinical signs does O. ostertagii type 1 cause in naive cows?
Diarrhea, acute wt. loss
What clinical signs does O. ostertagii type 1 cause in chronic disease?
Diarrhea
What will you see on post mortem of an O. ostertagii infection?
Moroccan leather abomasums
How do you treat O. ostertagii?
Ivermectin
What drug kills all life stages of O. ostertagii?
Ivermectin
What coccidiosis affects ruminants?
Eimeria
What does Eimeria cause in calves?
Nervous coccidiosis
What is the MoA of Eimeria?
Heat labile neurotoxin
What clinical signs do you see with Eimeria?
Bloody/tenesmus diarrhea followed by neuro signs
How do you treat coccidiosis in ruminants?
Amprolium (monensin, sulfa-containing drugs)
What is the intestinal threadworm of ruminants?
Strongyloides spp.
How do Strongyloides spp get to the intestines?
Penetrate oral mucosa/skin, blood to heart, migrate through lungs and trachea, coughed/swallowed
What is the tapeworm of ruminants?
Monezia
What shape is Monezia?
Rectangular/triangular shaped
This parasite is usually non-pathogenic but can cause intestinal stasis
Monezia
