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Virus classification
Group: Group II (ssDNA)
Family: Anelloviridae
Genus: Iotatorquevirus

Torque Teno Sus Virus

Iotatorquevirus is a recently discovered genus in the new family of Anelloviridae, in group II in the Baltimore classification. It encompasses the two type species of the Torque Teno Sus Virus 1 and 2.


The virons are small and non enveloped.

The viruses are usually acquired soon after birth and may invade virtually any tissue in the body.[1]

They are widespread in the pig population[2][3]


The genome is a circular single stranded DNA molecule of negative polarity.


Postweaning multisystemic wasting syndrome has been causally associated with porcine circovirus type 2.[4] The Iotatorquevirus have also been linked with this syndrome but a causative role—if one exists—has yet to be established.[5]


  1. ^ Aramouni M, Segalés J, Cortey M, Kekarainen T (2010). "Age-related tissue distribution of swine Torque teno sus virus 1 and 2". Vet. Microbiol. 146 (3-4): 350–3. doi:10.1016/j.vetmic.2010.05.036. PMID 20646878. 
  2. ^ Brink M, Ståhl K, Masembe C, Okurut AR, Berg M, Blomström AL (2012). "First time molecular detection and phylogenetic relationships of torque teno sus virus 1 and 2 in domestic pigs in Uganda: further evidence for a global distribution". Virol. J. 9: 39. doi:10.1186/1743-422X-9-39. PMC 3298808Freely accessible. PMID 22336096. 
  3. ^ Kekarainen T, Segalés J (2012). "Torque teno sus virus in pigs: an emerging pathogen?". Transbound Emerg Dis. 59 (Suppl 1): 103–8. doi:10.1111/j.1865-1682.2011.01289.x. PMID 22252126. 
  4. ^ Wallgren P, Belák K, Ehlorsson CJ, Bergström G, Lindberg M, Fossum C, Allan GM, Robertsson JA (2007). "Postweaning multisystemic wasting syndrome (PMWS) in Sweden from an exotic to an endemic disease". Vet Q. 29 (4): 122–37. doi:10.1080/01652176.2007.9695238. PMID 18265702. 
  5. ^ Nieto D, Aramouni M, Grau-Roma L, Segalés J, Kekarainen T (2011). "Dynamics of Torque teno sus virus 1 (TTSuV1) and 2 (TTSuV2) DNA loads in serum of healthy and postweaning multisystemic wasting syndrome (PMWS) affected pigs". Vet. Microbiol. 152 (3-4): 284–90. doi:10.1016/j.vetmic.2011.05.020. PMID 21680113. 

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