Torque teno sus virus (TTSuV, swine TTV, porcine anellovirus), belonging to the family Anelloviridae, is a group of virus strains that are non-enveloped, with a single-stranded circular DNA genome ranging from 2.6 to 2.8 kb in size.

There is the possibility that TTSuV may worsen the progression of other diseases and therefore increase the economic losses for pig industry.

In 2002, the genome of Torque teno sus virus (TTSuV), isolated from swine serum, was first sequenced in Japan.

[2][1] The genome has three open reading frames, ORF1 (capsid), ORF2 and ORF3 and a highly conserved untranslated region.

[7] Studies have shown that TTSuV could serve as a trigger in the pathogenesis of post-weaning multisystemic wasting syndrome (PMWS) caused by Porcine circovirus type 2 (PCV2).