Nematodes

Dictyocaulus filaria

Dictyocaulus filaria occurs in sheep in many areas of the world, including Canada, where it seems to be a rare cause of clinical disease.

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.

Trichostrongyles and other GI nematodes

The taxonomic family Trichostrongylidae contains most of the important gastro-intestinal nematodes of cattle around the world.