Table 1. Vietnam IBV isolates analyzed in this study

Isolates Year Production type(age) Province Tissues1 IBV vaccine Clinical signs2
VNUA3 2014 Broiler (24 days old) Hanoi Tra, Kid Ma5 R, N
VNUA8 2015 Layer (29 weeks old) Thainguyen Tra, Kid Ma5, 4/91 R,N, ED
VNUA11 2015 Layer (34 weeks old) Haiphong Tra Ma5, 4/91 R, N, ED
Tra, trachea; Kid, kidney.
R, respiratory; N, nephritis; ED, reduced egg production.