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.

Cheyletiella species

Dogs and cats each have their own species of the mite Cheyletiella, which appear to be host-specific — C. yasguri in dogs and C. blakei in cats.

Cryptosporidium species

Cryptosporidium spp. are gastrointestinal coccidians (although the taxonomy is controversial) of a wide range of vertebrates (mammals, birds, amphibians, reptiles, and fish). Surveys from several locations around the world based on fecal examination for Cryptosporidium oocysts have demonstrated a prevalence of up to 40 per cent in dogs and cats.

Cuterebra species — rabbit bot

Adults of the dipteran (fly) genus Cuterebra are free-living. Larvae are found under the skin of various hosts, generally rodents but occasionally dogs and cats.

Cystoisospora species

Dogs and cats around the world, especially pups and kittens, are often infected with a range of species of Cystoisospora (formerly known as Isospora).

Demodex species — cats

Cats can be infested with three species of Demodex: D. cati, D. gatoi, and a third, as yet un-named species.

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.

Dioctophyma renale

Dioctophyma renale occurs in dogs, foxes, mink, ferrets, otters, cats (on occasion), pigs, horses, cattle and people.

Dipylidium caninum

Dipylidium caninum is a tapeworm of the small intestines of domestic dogs and cats and free-ranging canids and felids.

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.

Echinococcus multilocularis

The cestode genus Echinococcus contains at least seven established species, two of which occur in Canada: Echinococcus canadensis and E. multilocularis.

Eucoleus (Capillaria) aerophila

Eucoleus aerophila is a tracheal worm that infects primarily foxes and occasionally other free-ranging carnivores, dogs, cats and people.

Eutrombicula species

Trombiculid mites are free-living but their larval stages can infest a range of mammals, birds and people, causing sometimes severe skin lesions characterised by intense pruritus.

Giardia species

Giardia species occur around the world in people, domestic animal and wildlife.

Ixodes species

Ixodes spp. ticks are a genus of hard ticks found worldwide. In North America, the primary species of veterinary and public health importance are I. scapularis (in southern Manitoba, Ontario, Quebec, New Brunswick, Nova Scotia and the eastern USA) and I. pacificus (in coastal regions of western North America).

Lice Dogs and Cats: chewing (Mallophaga), and sucking (Anoplura)

Lice occur on dogs and cats around the world. In Canada dogs are hosts to both sucking and chewing lice (Linognathus setosus and Trichodectes canis, respectively), and cats only to chewing lice ( Felicola subrostratus), which are most commonly seen on farm cats.

Myiasis

Myiasis is the infestation of living vertebrates with the larvae of flies, the species of which vary with location around the world.

Notoedres cati

Mites of the burrowing mite genus Notoedres infest domestic cats and free-ranging felids, and rarely domestic dogs and free-ranging canids, around the world.

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.

Otodectes cynotis

The ear mite Otodectes cynotis infects dogs and cats and several free-ranging carnivores around the world.

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.

Sarcocystis species-pigs

Species of the intracellular, apicomplexan protozoan Sarcocystis occur in mammals, reptiles and birds around the world, including in Canada.

Taenia species

The cestode genus Taenia includes several species that as adults live in the small intestine of dogs and/or cats and free-ranging carnivores around the world.

Tick-borne pathogens

Relative to the United States and many other countries, the burden of tick-borne pathogens that can infect pets and people is thought to be relatively low in Canada.

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.

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.

Trictrichomonas foetus

Recognition of the Trictrichomonas foetus as an important enteric parasite of cats first occurred in the mid-1990s. Since then reports from several regions of the world have established that the parasite is an important pathogen in these hosts.

Trictrichomonas foetus

Recognition of the Trictrichomonas foetus as an important enteric parasite of cats first occurred in the mid-1990s. Since then reports from several regions of the world have established that the parasite is an important pathogen in these hosts.