Studies on infection and immunity with the lungworm, Dictyocaulus viviparus (Bloch). II. Active immunization of calves.
D000818:Animals; D002417:Cattle / Q000469:parasitology; D004021:Dictyocaulus; D009349:Nematode Infections / Q000662:veterinary*; D014611:Vaccination
CATTLE/parasitology; NEMATODE INFECTIONS/veterinary