title: The complement fixing antibody response of calves to Dictyocaulus viviparus. III. Vaccinated calves exposed to challenge.
mesh_terms: D000818:Animals; D000917:Antibody Formation; D002417:Cattle; D004021:Dictyocaulus; D009349:Nematode Infections / Q000276:immunology*
keywords: NEMATODE INFECTIONS/immunology