background occult hepatitis b virus infection (obi) is defined as the presence of hepatitis b virus (hbv) dna in the liver and/or in the serum of patients with negative results of hepatitis b s antigen (hbsag) test with or without serological markers of previous viral exposure. the impact of obi in patients with chronic hepatitis c (chc) is still unclear. objectives the aim of this study was to...

conclusions the results indicated that there was a positive association between susceptibility to chronic hbv infection and tnf-α polymorphism. in addition, hbv patients carrying -308 gg, -857 cc, and -863 aa genotypes with lower serum levels of tnf-α had an increased risk of infection. background the host genetic background regulates the natural history of chronic hepatitis b virus (hbv) infec...

The genome of a recently identified virus, hepatitis G virus (HGV), shows considerable homology to hepatitis C virus (HCV). Two HGV proteases similar to nonstructural proteins NS2 and NS3 of HCV were identified, and their cleavage site specificity was investigated. Amino acids essential for the protease activities were determined by mutation analysis. NS4A of HGV was demonstrated to be a cofact...

    Abstract   Background: Hepatitis B virus infection is an important cause of liver morbidity and   mortality worldwide. HDV changes the natural course of HBV. The prevalence of HDV infection wasn’t determined in the various groups of HBV infection (carriers, acute hepatitis, chronic hepatitis, cirrhosis and HCC) in Iran. We aimed to research the prevalence of hepatitis D virus infection in v...

Literature review shows that hepatitis C infection may increase the risk of non-hodgkin lymphoma. Reactivation of hepatitis B infection has been reported in patients with hairy cell leukemia after chemotherapy and/or splenectomy. We present hepatitis B surface (HBs) antigenemia and concurrent hepatitis C virus (HCV) seropositivity in a case of hairy cell leukemia. Key Words: Hairy cell leukemi...

background and aims: human parvovirus b19, a member of the parvoviridae family, with single-stranded dna is a very minute non-enveloped virus. b 19 virus is mostly transmitted via the respiratory tract but some studies have been reported which b19 virus can be transmitted through blood and/or blood products. the aim of this study was to evaluate the prevalence of b19 among blood donors in tehra...

1. Emerson SU, Purcell RH. Hepatitis E virus. Rev Med Virol. 2003;13:145–54. DOI: 10.1002/rmv.384 2. Lemos G, Jameel S, Pande S, Rivera L, Rodríguez L, Gavilondo JV. Hepatitis E virus in Cuba. J Clin Virol. 2000;16:71–5. DOI: 10.1016/S1386-6532(99)00062-1 3. Gambel JM, Drabick JJ, Seriwatana J, Innis BL. Seroprevalence of hepatitis E virus among United Nation Mission in Haiti (UNMIH) peacekeepe...

objectives: patients with hepatitis c virus infection are at high risk of getting hepatitis a virus. hepatitis a virus is an important widespread virus that usually causes more severe medical consequences in patients with chronic liver disease. the purpose of this study was to evaluate prevalence of hepatitis a virus antibody in patients with chronic hcv in isfahan province, iran. methods: a cr...

I read with interest the recently published article by Ramezani et al. [1] in your journal. The issue is important but all the aspects and clinical importance of the study are not clear. According to an international workshop on occult hepatitis B virus infection (OBI) in 2008 [2], OBI is defined as the presence of HBV DNA in the liver (with detectable or undetectable HBV DNA in the serum) of i...

Background and Aims: Hepatitis A virus is a cause of acute viral hepatitis that infects millions people worldwide each year maintains its prominence in both adults childhood. The aim this study was to determine the seroprevalence different age groups Çorum which reference center for northern part central Anatolia make recommendations vaccine according groups. Materials Methods: This retrospecti...