Gammatorquevirus is a genus of viruses in the family Anelloviridae, in group II in the Baltimore classification.

The fifteen species are all named "torque teno midi virus" (TTMDV), number 1–15.

The genus contains the following species:[1] TTMDV, which stands for transfusion transmitted midi virus or torque teno midi virus was first isolated in 2005 from patients with an acute viral infection syndrome.

It has been found in various bodily fluids, including saliva and nasopharyngeal aspirates.

Like other members of its family, TTMDV's genome is a circular single-stranded piece of DNA of a negative polarity.