BDV and psychiatric are said to linked with each other. Blood test reveals that the patients with bipolar disorder, depression have either BDV antibodies or BDV-RNA in them. Here are some of the papers supports their presence.

1. Dietrich DE, Bode L. Human Borna disease virus-infection and its therapy in affective disorders.
APMIS Suppl. 2008;(124):61-5.

2. Bode L, Ludwig H. Borna disease virus infection, a human mental-health risk. Clin Microbiol Rev. 2003 Jul;16(3):534-45.

3. Dietrich DE, Schedlowski M, Bode L, Ludwig H, Emrich HM. A viro-psycho-immunological disease-model of a subtype affective disorder.
Pharmacopsychiatry. 1998 May;31(3):77-82.