the genome of hb v virus of serotype ayw cloned in pbr322 and expression shuttle vector p yes2 were used for construction of the hbsag chimeric genes and their expression in saccharomyces cerevisiae. two recombinant plasmids were constructed. one of them contained the coding sequences for the major polypeptide of surface antigen. another construct carried the major polypeptide with the pre-s2 a...

Serum samples from 214 blood donors in the United Kingdom who were carriers of hepatitis B surface antigen (HBsAg) were examined for hepatitis B virus deoxyribonucleic acid (DNA) by DNA:DNA hybridisation and for hepatitis B e antigen (HBeAg) and its antibody. One fifth of the donors carried infectious virus in their circulation. The presence of hepatitis B virus DNA correlated well with that of...

conclusions hepatitis b core antibody immunoglobulin m positivity is different in healthy blood donors of different countries according to the prevalence of chronic hepatitis b and its vaccination. based on the current study findings, all positive samples of hepatitis b core antibody in iranian blood banks should be considered as candidates for occult hepatitis b not just the window period infe...

Background Occult hepatitis B infection (OBI) is considered a risk factor for progression of liver disease in patients with hepatitis B virus (HBV) infection. This disease progression is reported to be more significant in those with concomitant HIV infection. We aimed to determine the prevalence rate of OBI in a sample of HIV-positive patients. Materials and Methods: Sixty-six HIV-infected pati...

Liver transplantation is an excellent treatment for hepatitis B virus infected patients who have acute or chronic liver failure and/or primary liver cancer. Advances in antiviral prophylaxis prevent clinically significant graft re-infection for the majority of patients. Graft and patient survival has improved significantly during the past decade, and results of transplantation for hepatitis B v...

OBJECTIVE To review management of incidents involving exposure to blood reported to an occupational health unit. DESIGN Analysis of all reported incidents from January 1989 to June 1991. SETTING London teaching hospital. SUBJECTS 447 health care workers and students. MAIN OUTCOME MEASURES Immunisation against hepatitis B virus before exposure, proportion of known source patients tested ...

We read with great interest the article by Bazinet et al, which describes their findings from a phase II study of combination therapy tenofovir, peginterferon-alfa (pegIFN), and nucleic acid polymers (NAPs) REP-2139 or 2165 in hepatitis B e antigen–negative chronic B.1 The addition either NAP induced strong surface antigen (HBsAg) declines, resulting HBsAg undetectability ?50% patients. A signi...

Background: Although regular frequent blood transfusion improves overall survival of multi-transfused patients like β-thalassemic ones, it carries a definite risk of infection with blood-borne viruses such as viral hepatitis. This study was done to determine seropositivity of hepatitis B virus (HBV), hepatitis C virus (HCV), and Human Immunedeficiency Virus (HIV) infections among β-th...

The study was conducted in Keryab village to investigate the association, if any, between S.mansoni infection and hepatitis B surface antigen. The study revealed that the overall infection rate was 15% (45 out of 300 stool samples examined). The prevalence in females was higher than that of males (17.8% and 13.4respectively). The highest infection rate (17.5%) was reported among the 11-15 years...