Abstract
Cross neutralization tests with serotype-specific rabbit antisera were completed for three recent Canadian isolates of aquatic birnavirus (i.e. infectious pancreatic necrosis virus, IPNV). The three virus isolates, which were serologically related to each other, significantly crossreacted (>10% relatedness) with two of the five serotypes which have been previously reported in Canada (i.e. with aquatic birnavirus provisional serotypes A7 and A8). It is suggested that the aquatic birnavirus provisional serotypes A7 and A8 are highly similar and may be geographically widespread in Canada.
