title: [Detection of Intrahepatic HBV DNA in HBsAg-negative liver diseases].
abstract: OBJECTIVE
  Occult HBV infection is characterized by the presence of HBV infection with undetectable HBsAg. This study was carried out to find out the frequency of HBV infection in HBsAg- negative patients.
  
  
  METHODS
  Fifty-six HBsAg-negative patients including 17 anti-HCV positive patients were evaluated. Patients were grouped according to their serological status; group A (anti-HBc+, anti-HBs-, n=16), B (anti-HBc+, anti-HBs+, n=26), and C (anti-HBc-, anti-HBs+/-, n=14). DNA was extracted from frozen liver biopsy specimen, and HBV DNA level was measured with real-time PCR.
  
  
  RESULTS
  Overall frequency of detectable intrahepatic HBV DNA was 34% (19/56). The frequency was 56% (9/16) in group A, 31% (8/26) in group B and 14% (2/14) in group C (P=0.01). Intrahepatic HBV DNA levels were as follows; 2,010 +/- 6,660 copies/mg in group A, 6,180 +/- 29,530 copies/mg in group B and 350 +/- 1,220 copies/mg in group C. The frequency of occult HBV infection was not increased in anti-HCV positive patients.
  
  
  CONCLUSIONS
  Intrahepatic HBV DNA is frequently detected in anti-HBc positive, HBsAg-negative patients, although the concentration is low.
authors.affiliation: Department of Gastroenterology, Gil Medical Center, Gachon University, Inchon, Korea. kimys@gilhospital.com
authors.forename: Yun Soo
authors.initials: YS
authors.lastname: Kim
authors.forename: Jae Young
authors.initials: JY
authors.lastname: Jang
authors.forename: Soo Hoon
authors.initials: SH
authors.lastname: Eun
authors.forename: Young Koog
authors.initials: YK
authors.lastname: Cheon
authors.forename: Young Seok
authors.initials: YS
authors.lastname: Kim
authors.forename: Jong Ho
authors.initials: JH
authors.lastname: Moon
authors.forename: Young Deok
authors.initials: YD
authors.lastname: Cho
authors.forename: So-Young
authors.initials: SY
authors.lastname: Jin
authors.forename: Chan Sup
authors.initials: CS
authors.lastname: Shim
authors.forename: Boo Sung
authors.initials: BS
authors.lastname: Kim
mesh_terms: D000328:Adult; D000368:Aged; D004279:DNA, Viral / Q000032:analysis*; D005260:Female; D006509:Hepatitis B / Q000175:diagnosis* / Q000276:immunology / Q000821:virology; D006514:Hepatitis B Surface Antigens / Q000032:analysis*; D006515:Hepatitis B virus / Q000235:genetics* / Q000302:isolation & purification; D006801:Humans; D008099:Liver / Q000821:virology*; D008297:Male; D008875:Middle Aged
chemical_list: D004279:DNA, Viral; D006514:Hepatitis B Surface Antigens