Sequence Heterogeneity of TT Virus

Sequence heterogeneity of TT virus and closely related viruses.

TT virus (TTV) is a recently discovered infectious agent originally obtained from transfusion-related hepatitis. However, the causative link between the TTV infection and liver disease remains uncertain. Recent studies demonstrated that genome sequences of different TTV strains are significantly divergent. To assess genetic heterogeneity of the TTV genome in more detail, a sequence analysis of ...

TT virus sequence heterogeneity in vivo: evidence for co-infection with multiple genetic types.

TT virus (TTV) is a newly described DNA virus of humans that exhibits an unusually high degree of genetic heterogeneity. We have performed extensive analysis of the TTV populations present in samples, taken over a period of 2 to 6 years, from three individuals with persistent TTV infection. TTV DNA titres estimated for sequential samples were found to be quite stable over the entire study perio...

Sequence heterogeneity in kinetoplast minicircle DNA of Leishmania majer

[Susceptibility of TT virus to interferon therapy].

A novel single stranded DNA virus, TT virus, associated with posttransfusion hepatitis was identified. The impact of the virus on development of chronic liver diseases and the susceptibility of the virus to interferon therapy has not been investigated. We retrospectively analyzed blood samples from 16 patients infected with both hepatitis C virus and TT virus who were treated by interferon. TT ...

Sequence heterogeneity in closed simian virus 40 deoxyribonucleic acid.

The heteroduplex molecules formed by self-annealing of denatured, singly nicked simian virus 40 (SV40) deoxyribonucleic acid (DNA) prepared from closed viral DNA were examined by formamide-protein film electron microscopy to test the DNA for sequence homogeneity. Sequence inhomogeneity appears in the heteroduplexes as single-strand loops. These result from sequence deletion or from sequence sub...