نتایج جستجو برای: hepatitis b virus dna
تعداد نتایج: 1668671 فیلتر نتایج به سال:
OBJECTIVES The aims of this study are to investigate the prevalence of occult hepatitis B virus infection among patients with cryptogenic cirrhosis and to analyze the relationship between surface protein variability and occult hepatitis B virus infection, which may be related to the pathogenesis of occult hepatitis B virus infection in cryptogenic cirrhosis. Occult hepatitis B virus infection i...
background: in spite of available, and sensitive screening assay for detection of hepatitis b virus surface antigen (hbsag), occasional cases of post-transfusion hepatitis b virus infection are still observed. the aim of the present study was to assess the prevalence of positive anti hepatitis b core (anti-hbc) and presence of hbv-dna in serum sample of healthy blood donors negative for both hb...
Background & Aim: Hepatitis B virus(HBV) infection is endemic worldwide. It is estimated every year more than 350 million people become infected with HBV(new cases) worldwide. Unfortunately, there are no satisfactory drugs to cure HBV and related diseases and the only way to control it is through vaccination. Measurements of HBV DNA levels are routinely used to identify infectious chronic c...
background the occult hepatitis b infection (obi) is defined as the presence of hepatitis b virus (hbv) dna in the sera or in the liver biopsy and the absence of hepatitis b surface antigen (hbsag) by serological test. objectives the current study aimed to evaluate the occult hbv infection by polymerase chain reaction (pcr) and determine hbv genotyping among the patients with abnormal alanine t...
The Southern transfer hybridisation technique was used to test mononuclear blood cells for hepatitis B virus DNA. Viral DNA sequences were detected in mononuclear cells of 10 out of 16 patients with hepatitis B virus infection and in none of 21 normal controls. Blood contamination was excluded by the absence of hepatitis B virus DNA in the corresponding serum samples in all cases. Free monomeri...
Abstract Background: Mannose-binding lectin (MBL) is a constituent of the human innate immune system which may play an important role in combating a variety of infectious diseases and thus may be important for determining hepatitis B virus (HBV) persistence. In this study, we determined MBL genotypes in chronic hepatitis B subjects, spontaneously recovered subjects and healthy controls. Me...
Background: Hepatitis B surface antigen (HBsAg) is one of the main proteins of HBV envelop and its serum quantitative measurement is the most common quantitative test for monitoring the progress of Chronic Hepatitis B. Although measurement of serum HBV DNA copy number is a gold standard method for displaying viral load, the test is relatively expensive and it is not readily available everywhere...
The presence in serum of hepatitis B e antigen (HBeAg) and hepatitis B virus DNA, which are each regarded as reflecting multiplication of hepatitis B virus, were looked for one to five days after the onset of hepatic encephalopathy in 64 patients with fulminant hepatitis B. HBeAg and hepatitis B virus DNA were found in the serum of only 24 (37%) and six (9%) patients, respectively. Hepatitis B ...
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...
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