Hepatitis Delta Virus

**Definition:** A defective virus, containing particles of RNA nucleoprotein in virion-like form, present in patients with acute hepatitis B and chronic hepatitis. It requires the presence of a hepadnavirus for full replication. This is the lone species in the genus Deltavirus.

**Tree numbers:** - B04.265.270 - B04.450.411 - B04.820.480.875

**Synonyms:** - Delta Agent - Hepatitis D Virus - Delta Virus