title: On the immunological response of young calves to light Nematodirus helvetianus infection.
abstract: Infecting parasite-free eight week old calves with 8,000 infective Nematodirus helvetianus larvae did not modify appreciably their response to a later heavy field challenge with N. helvetianus, Ostertagia ostertagi and Cooperia oncophora, although two of six animals did have smaller Nematodirus burdens.
mesh_terms: D000818:Animals; D002417:Cattle; D002418:Cattle Diseases / Q000276:immunology*; D007814:Larva / Q000276:immunology; D014251:Trichostrongyloidea / Q000276:immunology; D014252:Trichostrongyloidiasis / Q000276:immunology / Q000662:veterinary*