[Attenuated strains of hepatitis virus of ducklings].
D000818:Animals; D000917:Antibody Formation; D004372:Ducks; D006518:Hepatitis Viruses / Q000472:pathogenicity*; D006520:Hepatitis, Animal / Q000382:microbiology*; D011201:Poultry Diseases / Q000382:microbiology*; D014611:Vaccination; D014774:Virulence; D014776:Virus Cultivation
Attenuirovannye shtammy virusa gepatita utiat.