ICTV Virus Taxonomy Profile: Bacilladnaviridae 2026

Bacilladnaviridae is a family of viruses with single-stranded, circular DNA genomes that range from 3.4 to 6 kb and contain a short double-stranded region of 0.5–1 kb. The genome is replicated by the rolling-circle mechanism. Bacilladnavirids encode a jelly-roll capsid protein which forms non-enveloped icosahedral capsids with a T =3 symmetry. All cultured bacilladnavirids infect diatoms, a group of unicellular algae (Stramenopiles), and cause lysis of the host cells. This is a summary of the International Committee on Taxonomy of Viruses (ICTV) Report on the family Bacilladnaviridae , which is available at ictv.global/report/bacilladnaviridae .