Studies of an agent causing mortality among ducklings immune to duck virus hepatitis.
D000818:Animals; D004352:Drug Resistance, Microbial; D004372:Ducks; D006520:Hepatitis, Animal / Q000276:immunology / Q000401:mortality*; D009500:Neutralization Tests; D010849:Picornaviridae; D011201:Poultry Diseases / Q000276:immunology / Q000401:mortality*; D014765:Viral Vaccines
D014765:Viral Vaccines