Nematoda. Phasmidia . Secernentea . Sipunculida . A phylum of unsegmented helminths with fundamental bilateral symmetry and secondary triradiate symmetry of the oral and esophageal structures. Many species are parasites. . 1.00
Nematodirus. A genus of roundworms in the family MOLINIEIDAE, whose species are important gastrointestinal parasites of RUMINANTS, especially CATTLE; SHEEP; and GOATS. . 0.79
Nippostrongylus. Nematode, Rat . Nematodes, Rat . Rat Nematodes . Rat Nematode . A genus of intestinal nematode parasites belonging to the superfamily HELIGMOSOMATOIDEA, which commonly occurs in rats but has been experimentally transmitted to other rodents and rabbits. Infection is usually through the skin. . 0.73
Nematocera. A suborder of insects which belong to the order DIPTERA. They include mosca, mosquito, gnats, black flies, true flies and long-horned flies. . 0.72
Nematocyst. Nematocysts . A double-walled capsule found in jellyfish and other CNIDARIA whose functions include prey capture, defense, locomotion, and attachment. Nematocysts contain toxic CNIDARIAN VENOMS which are injected into the victim via a barbed tubule. . 0.71
Antinematodal Agents. Antinematodal Drugs . Antinematodals . Agents, Antinematodal . Drugs, Antinematodal . Nematocides . Substances used in the treatment or control of nematode infestations. They are used also in veterinary practice. . 0.70