Infection by roundworms of the superfamily TRICHOSTRONGYLOIDEA, including the genera TRICHOSTRONGYLUS; OSTERTAGIA; Cooperia, HAEMONCHUS; Nematodirus, Hyostrongylus, and DICTYOCAULUS.

A superfamily of nematodes. Most are intestinal parasites of ruminants and accidentally in humans. This superfamily includes seven genera: DICTYOCAULUS; HAEMONCHUS; Cooperia, OSTERTAGIA; Nematodirus, TRICHOSTRONGYLUS; and Hyostrongylus.

A genus of roundworms in the family MOLINIEIDAE, whose species are important gastrointestinal parasites of RUMINANTS, especially CATTLE; SHEEP; and GOATS.

Infections by nematodes, general or unspecified.

Determination of parasite eggs in feces.

Infestation of animals with parasitic worms of the helminth class. The infestation may be experimental or veterinary.

A class of unsegmented helminths with fundamental bilateral symmetry and secondary triradiate symmetry of the oral and esophageal structures. Many species are parasites.

Diseases of domestic and mountain sheep of the genus Ovis.

Infections of the INTESTINES with PARASITES, commonly involving PARASITIC WORMS. Infections with roundworms (NEMATODE INFECTIONS) and tapeworms (CESTODE INFECTIONS) are also known as HELMINTHIASIS.

Diseases of domestic cattle of the genus Bos. It includes diseases of cows, yaks, and zebus.

Excrement from the INTESTINES, containing unabsorbed solids, waste products, secretions, and BACTERIA of the DIGESTIVE SYSTEM.