Serological identification of avian adenoviruses isolated from cases of inclusion body hepatitis in Victoria, Australia

Sixteen avian adenoviruses isolated from 12 cases of inclusion body hepatitis (IBH), 3 cases of respiratory disease, and a case of ruptured tendons were compared using antisera raised against 9 fowl adenovirus prototype strains. Eleven isolates from livers of birds with IBH were classified into 4 different serological groups: 1) YR36 (type 7)-related; 2) HVI (type 8)-related; 3) Variants--type 6-,7-, and S-related; and 4) Type 50--not closely related to any of the prototype antisera tested. These results indicate that, as in other countries, IBH in Victoria is associated with several serologically distinct adenoviruses. The other five adenovirus isolates were found to be related to CELO (type 1).