The remarkable coding strategy of borna disease virus: a new member of the nonsegmented negative strand RNA viruses.

BDV uses a remarkably broad range of mechanisms to direct expression of its 8.9-kb genome. Although much remains to be elucidated, it is clear that BDV genome expression is modulated by the use of multiple strategies, including differential gene transcription, post-transcriptional modification, and translational efficiency. Further insights into the details of this multilevel system will be essential to understanding BDV biology, pathogenesis, and neurotropism.