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general or unspecified; prefer specifics; infection = NEMATODE INFECTIONS; coordinate with specific precoordinated helminth terms (ANTIGENS, HELMINTH, etc) if pertinent
Scope Note
A phylum of unsegmented helminths with fundamental bilateral symmetry and secondary triradiate symmetry of the oral and esophageal structures. Many species are parasites.
A phylum of unsegmented helminths with fundamental bilateral symmetry and secondary triradiate symmetry of the oral and esophageal structures. Many species are parasites.