Nematodes
Dictyocaulus viviparus
The lung nematode Dictyocaulus viviparus occurs in cattle in many parts of the world, including Canada. Adult parasites live in the trachea and bronchi.
Setaria species
Nematodes of the genus Setaria infect cattle, sheep, sometimes other domestic animal hosts, and many free-ranging ungulates around the world, including in Canada.
Setaria species — pigs
Nematodes of the genus Setaria infect cattle, sheep, sometimes other domestic animal hosts, and many free-ranging ungulates around the world, including in Canada.
Stephanofilaria stilesi
Nematodes of the genus Stephanofilaria infect cattle in many parts of the world, including Canada.
Thelazia species
The nematode Thelazia (eye worm) occurs in cattle and rarely sheep and goats around the world, including in Canada.
Toxocara vitulorum
The small-intestinal nematode Toxocara vitulorum infects cattle, buffalo, zebu and rarely sheep and goats, mostly in tropical and subtropical climates like those in Africa, India a...
Trichostrongyles and other GI nematodes
The taxonomic family Trichostrongylidae contains most of the important gastro-intestinal nematodes of cattle around the world.