context hepatitis b and hepatitis c (hbv and hcv) infections are both major causes of hepatocellular carcinoma (hcc). however, hcc caused by each of these two viruses has unique characteristics that should be studied independently to that of another one. while hbv- and hcv-related hccs share similar host and environmental risk factors such as male gender, age above 50 years old, family history ...

background: because dental staff members are in continuous contact with blood and contaminated fluids of patients, they are considered as a high risk group. their knowledge about standard precautions is thus important in preventing infectious diseases such as hepatitis and human immunodeficiency virus (hiv). the purpose of this study was to estimate the injuries that occur in dental staff and t...

background and aims: recently, a novel dna virus was isolated from the serum of a patient with post-transfusion non a-g hepatitis and named tt virus. the aim of this study was to determine the prevalence tt virus among cirrhotic patients due to hepatitis b & c in infection ahwaz. methods: the prevalence of ttv infection was studied in 41 patients with liver cirrhosis. ttv dna was detected by se...

viral hepatitis is one of five infectional factors cause early death in all over the world. every day at least one million people die because of viral hepatitis. six hepatitis viruses have been known until now. they are a, b, c, d, e, g, and it is probable that at least two other kinds i.e. f, and h, will be known soon. only hepatitis b is a dna virus, and the others are rna viruses. all viruse...

Nowadays viral hepatitis is one of the most common and important causes of chronic liver disorders in the world. Extrahepatic manifestations of viral hepatitis consist a main part of the disease. The main viruses causing hepatitis include Hepatitis A, B and C viruses. Herein common skin manifestations in hepatitis C virus (HCV) are discussed. Chronic hepatitis causes skin disorders both directl...

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...

DNA coding for the core antigen from hepatitis B Virus (HBcAg) was amplified, cloned and propagated in E. coli. The core protein was expressed in E. coli and the product was readily detected by Western blot. This protein can be used as a diagnostic material in serum screening tests. To increase the level of expression of this antigen in bacteria, two plasmids were constructed in which the gene ...

Objective(s) The aim of this study was to characterize the hepatitis B virus surface protein genotypes and sequence variations among hepatitis B virus surface antigen (HBsAg) positive chronic patients in Hormozgan province, south of Iran. Materials and Methods A total of 8 patients enrolled in this study. The surface gene was amplified and directly sequenced. Genotypes and nucleotide/amino a...

 ABSTRACT Background: Hepatitis B virus (HBV) infection in patients who lack detectable hepatitis B surface antigen (HBsAg) is called occult hepatitis B infection. Such infections have been frequently identified in patients with chronic hepatitis Cliver disease, but their prevalence is not known. Methods: 207 patients with chronic hepatitis C who were HCV -RNA and antiHCV positive were stu...