A superfamily of parasitic nematodes which were formerly considered a part of TRICHOSTRONGYLOIDEA. It includes the following genera: Heligmosomum, NEMATOSPIROIDES, and NIPPOSTRONGYLUS. The hosts are rodents.

A species of intestinal nematode parasites which occur most commonly in mice. Infection is by ingesting larvae. This particular species is used extensively in immunological research.

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

Infections by nematodes, general or unspecified.

A superfamily of strongyles or roundworms which are parasites in the intestinal tract of equines, pigs, rodents, and primates (including man). It includes the genera Cyasthostomum, Ransomus, Globocephalus, OESOPHAGOSTOMUM, and STRONGYLUS.

A genus of nematodes found mainly in mice. Its organisms are used in biomedical research.

A plant genus of the family ASTERACEAE. The root and shoots have been used for food.

Any part or derivative of a helminth that elicits an immune reaction. The most commonly seen helminth antigens are those of the schistosomes.