title: [High prevalence of TT virus (TTV) infection and gene subtype analysis between Japanese and Chinese].
abstract: OBJECTIVE
  To compare the infection rates and gene subtypes of TTV between Japanese and Chinese.
  
  
  METHODS
  TTV was detected by a semi-nested PCR. The positive samples were sequenced directly.
  
  
  RESULTS
  Infection rate of T'TV in normal Chinese was 64%, but in the patients suffered from chronic C hepatitis, the infection rates were 68% in Chinese and 49.1% in Japanese The gene subtype of TTV Gla + 1b in Chinese was 40%, G2a+ 2b 60%; in Japanese TTV Gla+ 1b was 78.6%, G2a+ 2b 21.4%.
  
  
  CONCLUSIONS
  There were high infection rates of TTV in Chinese and Japanese. The gene subtype distribution of TTV had some difference between Chinese and Japanese.
authors.affiliation: Common Laboratory of Second Affiliated Hospital, Medical College of Shantou University, Shantou 515041, China.
authors.forename: W
authors.initials: W
authors.lastname: Liu
authors.forename: T
authors.initials: T
authors.lastname: Hada
authors.forename: H
authors.initials: H
authors.lastname: Xu
mesh_terms: D001483:Base Sequence; D002681:China / Q000453:epidemiology; D004266:DNA Virus Infections / Q000453:epidemiology* / Q000821:virology; D004279:DNA, Viral / Q000235:genetics; D005814:Genes, Viral / Q000235:genetics*; D005838:Genotype; D019698:Hepatitis C, Chronic / Q000150:complications*; D006801:Humans; D007564:Japan / Q000453:epidemiology; D008969:Molecular Sequence Data; D016133:Polymerase Chain Reaction; D017422:Sequence Analysis, DNA; D022783:Torque teno virus / Q000235:genetics*
chemical_list: D004279:DNA, Viral