[Infectious bonchitis of fowls. II. Change of viral virulence after serial passage in cell cultures].
D000818:Animals; D001991:Bronchitis / Q000662:veterinary*; D011201:Poultry Diseases; D014774:Virulence; D014776:Virus Cultivation
Infektiöse Bronchitis der Hühner. II. Anderung der Virusvirulenz nach Serienpassagen in Zellkulturen.