Veterinary helminthology

Trichinella spiralis is an ovoviviparous nematode parasite, occurring in rodents, pigs, horses, bears, and humans, and is responsible for the disease trichinosis.

Capillaria plica (dog bladder worm) is a parasitic nematode which is most often found in the urinary bladder, and occasionally in the kidneys, of dogs and foxes.

Toxascaris leonina is a common parasitic roundworm found in dogs, cats, foxes, and related host species.

Capillaria hepatica is a parasitic nematode which causes hepatic capillariasis in rodents and numerous other mammal species, including humans.

Metastrongylus is a genus of nematodes of the family Metastrongylidae, usually found as lungworms in pigs and sometimes causing verminous bronchitis.

Thelazia callipaeda is a parasitic nematode, and the most common cause of "thelaziasis" (or "eyeworm" infestation) in humans, dogs and cats.

Elaeophora bohmi is a nematode parasite found in various arteries of the horse.

Elaeophora schneideri (arterial worm; cause of elaeophorosis, aka "filarial dermatitis" or "sorehead" in sheep; or "clear-eyed" blindness in elk) is a nematode which infests several mammalian hosts in North America.

Elaeophora abramovi is a nematode parasite found in the hepatic arteries of the Moose (Alces alces) in Russia.

Elaeophora elaphi is a nematode parasite found in the blood vessels of the liver in Red Deer (Cervus elaphus) in certain parts of Spain.

Elaeophora poeli is a parasitic nematode found in the aorta, and sometimes the heart, of various cattle throughout Asia, and in parts of Africa.

Elaeophora sagitta is a parasitic nematode found in the heart, coronary arteries and pulmonary arteries of several ruminant species and African buffaloes in Africa.

Toxocara canis (also known as dog roundworm) is worldwide-distributed helminth parasite of dogs and other canids.

Haemonchus contortus, also known as the barber's pole worm, is very common parasite and one of the most pathogenic nematodes of ruminants.

Dirofilaria repens is a filarial nematode that affects dogs and other carnivores such as cats, wolves, coyotes, foxes, muskrats, and sea lions.

Thelaziasis (occasionally spelled "thelaziosis") is the term for infestation with parasitic nematodes of the genus Thelazia.

Ascaridia galli is a parasitic roundworm belonging to the phylum Nematoda.

Capillaria aerophila is a nematode parasite found in the respiratory tract of foxes, dogs, and various other carnivorous mammals.

Thelazia is a genus of nematode worms which parasitize the eyes and associated tissues of various bird and mammal hosts, including humans.

Muellerius capillaris (Mueller, 1889), also known as hair lungworm, is nematode parasite of small ruminants.

Habronema muscae is an internal stomach parasite that is most commonly found in horses.

Fasciolosis (also known as fascioliasis, fasciolasis, distomatosis and liver rot) is a parasitic worm infection caused by the common liver fluke Fasciola hepatica as well as by Fasciola gigantica.

Dipylidium caninum, also called the flea tapeworm, double-pore tapeworm, or cucumber tapeworm (in reference to the shape of its cucumber-seed-like proglottids, though these also resemble grains of rice or sesame seeds), is a cyclophyllid cestode that infects organisms afflicted with fleas and canine chewing lice, including dogs, cats, and sometimes human pet-owners, especially children.

Filariasis (or philariasis) is a parasitic disease caused by an infection with roundworms of the Filarioidea type.

Strongyles (from the Greek strongulos, meaning round), or alternatively, strongyls, are nematode worms of the family Strongylidae, order Strongylida.

Dictyocaulus is a genus of nematode parasites of the bronchial tree of horses, sheep, goats, deer, and cattle.

Fasciola is a genus of trematodes which includes economically important parasite species.

Gyrodactylus salaris is a small monogenean ectoparasite (about 0.5 mm long) which mainly lives on the skin of freshwater fish, especially Atlantic salmon.

Fascioloides magna, also known as giant liver fluke, large American liver fluke or deer fluke, is an important parasite of a variety of wild and domestic ruminants in North America and Europe.

Gorgodera amplicava is a species of digenetic trematode whose definitive hosts include amphibians.

A gapeworm (Syngamus trachea), also known as a red worm and forked worm, is a parasitic nematode worm infecting the tracheas of certain birds.

Cylicocyclus nassatus is a very common species of cyathostomin, which are important intestinal parasites of horses.

Parascaris equorum is a species of ascarid that is the equine roundworm.