Presentazione di PowerPoint

1
Anelloviruses Taxonomic perspectives
Philippe Biagini1 and Daniel Todd2. (1Anellovirus
study group, 2Circoviridae study group, chair)
Biagini, P., Todd, D., Bendinelli, M., Hino,
S., Mankertz, A., Mishiro, S., Niel, C., Okamoto,
H., Raidal, S., Ritchie, B.W. Teo, G.C. (2004).
Anellovirus. In Virus Taxonomy, VIIIth Report of
the International Committee for the Taxonomy of
Viruses (C.M. Fauquet, M.A. Mayo, J. Maniloff, U.
Desselberger, and L.A. Ball, eds), 335-341.
Elsevier/Academic Press, London.

• - On the basis of the study group work,
  presentation of the Anellovirus genus description
  was made in the VIIIth report of the ICTV
• At present time, all anelloviruses are grouped
  in a floating genus that comprises one species
  Torque teno virus (TTV), one tentative species
  Torque teno mini virus (TTMV) and several, as yet
  unclassified animal viruses, with similar
  circular single-stranded DNAs.
• One of the main aspects of the Anellovirus genus
  is the extraordinary high genetic diversity
  possibly existing between viral strains.
• A growing number of complete or partial TTV/TTMV
  sequences is collected on databases.
• Next step in the description of the diversity of
  these single-stranded DNA viruses would consist
  of the creation of a specific family.

Full ORF1 / amino acids

• Suggestions to create a new family called
  Anelloviridae, comprising a number of genera are
  being considered by the ICTV study group.
• The very high genetic divergence that exists
  between TTV, TTMV and a number of unclassified
  animal viruses supports the view that such
  viruses might be considered as representative
  members of distinct genera.

- Similarities existing between Chicken Anemia
Virus (CAV, Gyrovirus genus) and some
anelloviruses, may lead to a review of CAVs
taxonomic position. Re-classifying CAV to the
future Anelloviridae family is a possibility.