Nematodes of Horses Flashcards
Trichostrongylus axei (site)
stomach
Trichostrongylus axei (Pathogenesis)
Cushion-like thickening of glandular part of stomach
Trichostrongylus axei (route of infection)
Ingestion of L3 – non-migratory in host
Habronema and Draschia (site)
Stomach
Habronema and Draschia (Route of infection)
Adults – stomach, Larvae – skin wounds (“summer sores”), conjunctivae
Habronema and Draschia (eggs)
1 species lays larvated egg – thin shelled & very elongated;
other species lay larvae.
Eggs usually don’t float.
Habronema and Draschia (Pathology)
Draschia – lg. stomach nodules
Habronema - gastritis
Parascaris equorum (site)
Small intestine of young horses (under 6 months)
Parascaris equorum (egg)
spherical, pitted thick shell, brown
Parascaris Equorum (Importance)
Verminous pneumonia; rarely intestinal obstruction/rupture
Strongyloides westeri (host)
Horse; donkey (foals)
Females parasitic; may be free-living
Large Strongyles (common name)
red worm
Large Strongyles (site)
cecum/colon
Large Strongyles (type of feeding)
draw a mass of intestinal mucosa into buccal capsule and digest it – leaves scars with raised heavy fibrous rim – easily seen on the gut wall.
Most important nematode of the horse
Strongylus vulgaris