Anaplasma marginale
Anaplasma marginale is a rickettsial organism that infects the erythrocytes of cattle and is transmitted by ticks.
Besnoitia species
The apicomplexan protozoan Besnoitia infects cattle and goats in tropical and subtropical countries, especially in Africa.
Chorioptes bovis — chorioptic mange
The mange mite Chorioptes occurs on cattle and other domestic animals and wildlife around the world, including in Canada.
Cryptosporidium species — cattle
Cattle around the world are infected at some stage in their lives with Cryptosporidium, and intracellular parasite of enterocytes.
Culicoides species — biting midges or no-see-ums
Midges of the genus Culicoides occur around the world, including in Canada. Adult females must blood-feed on animals, producing painful bites prior to laying eggs.
Dermacentor albipictus
Dermacentor albipictus (the winter tick or moose tick) is a large reddish-brown to gray-brown tick. In Canada, D. albipictus is found in all provinces and territories, appearing as far north as the southern Yukon.
Dermacentor andersoni -- horses
Dermacentor andersoni is a large reddish-brown to gray-brown tick. In Canada, it is found from central Saskatchewan and west through Alberta and into British Columbia.
Dermacentor variabilis: American dog tick
Dermacentor variabalis is a large reddish-brown to gray-brown tick. In Canada, D. variabilis is found from eastern Saskatchewan and east through to Nova Scotia, primarily in the southern portions of each province.
Dicrocoelium dendriticum
The trematode Dicrocoelium dendriticum occurs in cattle, sheep and other ungulates in many parts of the world, including western Canada.
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.
Eimeria species
Coccidian protozoa of the genus Eimeria are common in cattle around the world. Many species are considered to be of little or no clinical significance but in Canada E. zuernii and E. bovis are associated with disease.
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.
Haematobia irritans
The hornfly Haematobia irritans occurs in association with cattle around the world, including in Canada.
Hypoderma bovis and H. lineatum
Hypoderma bovis and Hypoderma lineatum are the common warble flies of cattle, and occasionally other hosts, in the northern hemisphere.
Lice: chewing and sucking species
Sucking and chewing lice occur on cattle around the world. The life cycle is direct and all life cycle stages - adults, eggs (nits), larvae and nymphs occur on the host.
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.
Musca autumnalis
The face fly Musca autumnalis occurs on cattle and sometimes horses around the world, including in Canada.
Neospora caninum
Neospora caninum is a protozoan parasite, closely related and in several respects similar to Toxoplasma gondii, that is a major cause of abortion in cattle around the world and an occasional cause of neurological disease in young calves, dogs and other mammalian hosts.
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.
Simulium species — black flies or buffalo gnats
Flies of the genus Simulium (blackflies or buffalo gnats) occur in almost all parts of the world, including Canada.
Stephanofilaria stilesi
Nematodes of the genus Stephanofilaria infect cattle in many parts of the world, including Canada.
Stomoxys calcitrans — stable fly
The stable fly Stomoxys calcitrans occurs around the world. The life cycle involves egg laying in faeces or decaying and damp organic material, for example straw bedding.
Taenia saginata and Cysticercus bovis - beef tapeworm of people
The adult cestode Taenia saginata (beef tapeworm) and its larval stage, Cysticercus bovis, occur in people and cattle, respectively, in many parts of the world where beef is part of the human diet.
Taenia saginata and Cysticercus bovis — beef tapeworm of people
The adult cestode Taenia saginata (beef tapeworm) and its larval stage, Cysticercus bovis, occur in people and cattle, respectively, in many parts of the world where beef is part of the human diet.
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 and Asia.
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.