Cryptosporidium species — sheep
The primary species in sheep (and goats) is potentially zoonotic C. parvum. A new species - C. xiaoi - has recently been described from sheep, but its occurrence and significance have not yet been fully determined.
Dicrocoelium dendriticum
The trematode Dicrocoelium dendriticum occurs in cattle, sheep and other ungulates in many parts of the world, including western Canada.
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.
Eimeria species — sheep
Coccidian protozoa of the genus Eimeria are common in sheep around the world.
Fasciola hepatica
The trematode Fasciola hepatica (the common liver fluke of ruminants) infects cattle and sheep, and less commonly a range of domestic and wildlife species, around the world.
Fascioloides magna
The trematode Fascioloides magna (the large liver fluke of ungulates) occurs in several areas of the world, including parts of Canada.
Giardia species (sheep)
Giardia occurs in sheep around the world, including in Canada.
Melophagus ovinus
The ked Melophagus ovinus is a Dipteran (two-winged fly) without wings, and occurs on sheep around the world, including in Canada.
Moniezia and Thysanosoma
The large cestodes Moniezia and Thysanosoma in cattle and sheep, and occasionally free-ranging ungulates, are found around the world, including in Canada.
Oestrus ovis
Oestrus ovis, the sheep nasal bot, can be found in sheep farming areas worldwide, including in Canada.
Otobius megnini
The Argasid (soft) tick Otobius megnini, the spinose ear tick, infects cattle, sheep, dogs, horses and occasionally people in and North America, including Canada, as well as South America, India, and South Africa.
Sarcocystis species-pigs
Species of the intracellular, apicomplexan protozoan Sarcocystis occur in mammals, reptiles and birds around the world, including in Canada.
Sarcoptes species — sarcoptic mange or scabies in cattle
Burrowing mites of the genus Sarcoptes infest cattle, sheep, goats and a range of other hosts around the world.
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.
Taenia ovis and Cysticercus ovis
Cysticercus ovis, the infective larval stage of Taenia ovis, a cestode parasite of dogs (and perhaps free-ranging carnivores), occurs around the world, including in Canada.
Toxoplasma gondii
Toxoplasma gondii is a zoonotic intracellular apicomplexan protozoan parasite of mammals and birds that occurs around the world, including in Canada.
Toxoplasma gondii
Toxoplasma gondii is a zoonotic intracellular apicomplexan protozoan parasite of mammals and birds that occurs around the world, including in Canada.
Toxoplasma gondii — pigs
Toxoplasma gondii is a zoonotic intracellular apicomplexan protozoan parasite of mammals and birds that occurs 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.