Aelurostrongylus abstrusus
Aelurostrongylus abstrusus occurs in cats in many parts of the world, especially where it is warm and damp. The parasite is seen occasionally as a clinical problem in British Columbia.
Ancylostoma tubaeforme
The nematode Ancylostoma tubaeforme is a hookworm of cats that occurs around the world. Infection with A. tubaeforme is rarely diagnosed in cats in Canada.
Capillaria plica
The nematode Capillaria plica occurs in the urinary bladder of dogs, free-ranging carnivores, and rarely cats, worldwide, likely including Canada.
Dioctophyma renale
Dioctophyma renale occurs in dogs, foxes, mink, ferrets, otters, cats (on occasion), pigs, horses, cattle and people.
Dirofilaria immitis
The nematode Dirofilaria immitis (heartworm) occurs in domestic dogs and less often in cats, and in free-ranging canids and other carnivores, in many regions of the world.
Eucoleus (Capillaria) aerophila
Eucoleus aerophila is a tracheal worm that infects primarily foxes and occasionally other free-ranging carnivores, dogs, cats and people.
Ollulanus tricuspis
The trichostrongyle nematode Ollulanus tricuspis infects predominantly cats and wild felids, and occasionally pigs, foxes and dogs, in Europe, North and South America, Australia and the Middle East.
Physaloptera species
Physaloptera spp. are spiruroid stomach nematodes that occur primarily in cats, wild felids and occasionally dogs in North America, including Canada, as well as in South America, China, and Africa.
Toxascaris leonina
Toxascaris leonina is an ascarid nematode of the small intestine of domestic dogs and cats and free-ranging canids and felids.
Toxocara cati
Toxacara cati is an ascarid nematodes of the small intestine of cats and free-ranging felids. It occurs around the world, including Canada.