title: [Analysis of eleven isolated transfusion transmitted virus genotype].
abstract: OBJECTIVE
  To analyze transfusion transmitted virus (TTV) genotype in hepatitis patients and healthy people.
  
  
  METHODS
  DNA fragment of TTV was amplified by polymerase chain reaction with nested primers in eight patients with liver disease and three healthy persons. The nested PCR products were cloned and sequenced.
  
  
  RESULTS
  A TTV DNA sequence of 222 bp (primer sequence excluded) was compared among the 11 subjects. The similarity between N22 and WH1, WH2, WH3, GZ1, GZ2, GZ3, SD2, SD3 was 97.0%, 97.0%, 98.0%, 98.0%, 95.0%, 95.0%, 94.6% and 95.5%, respectively. The similarity between TXO11 and GZ4, SD1, XJ1 was 98.0%, 98.0% and 95.0%, respectively.
  
  
  CONCLUSIONS
  According to Okamoto's method, the eleven TTV clones are classified into two subtypes: genotype 1a and 1b.
authors.affiliation: Department of Infectious Diseases, Nanfang Hospital, First Military Medical University, Guangzhou 510515, China.
authors.forename: H
authors.initials: H
authors.lastname: Xiao
authors.forename: W
authors.initials: W
authors.lastname: Liang
authors.forename: Y
authors.initials: Y
authors.lastname: Wang
authors.forename: J
authors.initials: J
authors.lastname: Zhang
authors.forename: K
authors.initials: K
authors.lastname: Luo
mesh_terms: D001483:Base Sequence; D005075:Biological Evolution; D004279:DNA, Viral / Q000737:chemistry; D005838:Genotype; D006801:Humans; D008969:Molecular Sequence Data; D022783:Torque teno virus / Q000145:classification* / Q000235:genetics
chemical_list: D004279:DNA, Viral