IBV antigen having a better group specif icing could be reacted with antibodies to IBV Gray strain M strain. Conn strain, T strain, B strain, H strain, Ark99 strain, SE17 strain individually.

• 与IBV Gray株、M株、Conn株、T株、B株、H株、Ark99株、SE17株的抗血清有交义反应，有较好的群特异性；