Equine parasitology | Comments

#3 Gasterophilus (not “gastrophilus” as misspelled in the question) is mostly confined to the mouth and stomach of the horse. That’s not “extensive migration.” Migration refers to the movement of parasites through various organs of the host.

#11 Trichostrongylus axei is a common parasite of ruminants and is only seen in horses that are grazed along with ruminants or in those horses grazing a ruminant pasture. Since co-grazing is not common, this is not a common parasite of horses.

#14 While ascarids do migrate through the liver and lungs, severe liver damage is not a common finding.

#16 Pasture and paddock management is futile, as parascaris eggs can survive 10 years in the environment. They are also quite sticky and can be ingested from the walls of a stall. Eggs of parascaris are also very resistant to disinfecting agents. Parascaris spp. are commonly resistant to macrocyclic lactones. Tetrahydropyrimidin es cause spastic (rigid) paralysis and might not be the best choice as this could cause intestinal impaction. Fenbendazole might be the best choice.

#35 and #36 are unanswerable without knowing which test was used in the referenced class.