نتایج جستجو برای: hbv genotypes

تعداد نتایج: 69069  

Journal: :Liver International 2021

Background & Aims HBV genotype G (HBV/G) is mainly found in co-infections with other genotypes and was identified as an independent risk factor for liver fibrosis. This study aimed to analyse the prevalence of HBV/G healthy European carriers characterize crosstalk genotypes. Methods A total 560 were tested via HBV/G-specific PCR co-infections. Quasispecies distribution analysed deep sequencing,...

Journal: :iranian journal of public health 0
m norouzi sa ghorashi f abedi a nejatizadeh b ataei r malekzadeh

background: hepatitis b virus (hbv) gene and protein variations are frequently been seen in chronic patients. the aims of study were to determine the genotypes as well as the patterns of variations distribution in chronically-infected patients from the central part of iran. methods: the surface gene was amplified, sequenced and subsequently aligned using international and national iranian datab...

Journal: :iranian journal of basic medical sciences 0
mehdi norouzi iranian national institute for genetic engineering and biotechnology, tehran, iran seyed ali ghorashi iranian national institute for genetic engineering and biotechnology, tehran, iran behrooz ataei infectious diseases and tropical medicine research center, isfahan university of medical sciences, isfahan, iran majid yaran infectious diseases and tropical medicine research center, isfahan university of medical sciences, isfahan, iran reza malekzadeh digestive disease research center, shariati hospital, tehran, iran seyed moayyed alavian baqiyatallah university of medical sciences, baqiyatallah research centre for gastroenterology and liver disease, tehran, iran

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 acid...

2015
Florian Bihl Gladys Martinetti Gilles Wandeler Rainer Weber Bruno Ledergeber Alexandra Calmy Manuel Battegay Matthias Cavassini Pietro Vernazza Anna-Paola Caminada Martin Rickenbach Enos Bernasconi

BACKGROUND Hepatitis B virus (HBV) genotypes can influence treatment outcome in HBV-monoinfected and human immunodeficiency virus (HIV)/HBV-coinfected patients. Tenofovir disoproxil fumarate (TDF) plays a pivotal role in antiretroviral therapy (ART) of HIV/HBV-coinfected patients. The influence of HBV genotypes on the response to antiviral drugs, particularly TDF, is poorly understood. METHOD...

Journal: :Journal of clinical microbiology 2002
Jia-Horng Kao Pei-Jer Chen Ming-Yang Lai Ding-Shinn Chen

Pathogenic and therapeutic differences among hepatitis B virus (HBV) genotypes have been documented. However, the association of virological characteristics with clinical differences among HBV genotypes remains unclear. We therefore studied the clinical and virological characteristics of Taiwanese volunteer blood donors infected with HBV genotypes B and C. HBV genotypes were determined in 300 c...

Journal: :World journal of gastroenterology 2004
Guo-Bing Zeng Shu-Juan Wen Zhan-Hui Wang Li Yan Jian Sun Jin-Lin Hou

AIM Traditional hepatitis B virus (HBV) genotyping methods using restriction fragment length polymorphism (RFLP) can reliably identify genotypes A to F. As HBV genotypes G and H have been recently identified, this study was to establish an accurate and simple genotyping method for all eight HBV genotypes (A to H). METHODS Two hundred and forty HBV small S sequences obtained from GeneBank were...

2017
Nan Nwe Win Shingo Nakamoto Myint Myint Sein Mitsuhiko Moriyama Tatsuo Kanda Hiroshi Shirasawa

Myanmar is adjacent to India, Bangladesh, Thailand, Laos and China. In Myanmar, the prevalence of hepatitis B virus (HBV) infections is 6.5% and accounts for 60% of hepatocellular carcinoma. HBV has nine genotypes that have been identified by molecular genetic analysis. HBV genotypes are associated with several clinical features. We reviewed the prevalence of HBV genotypes in Myanmar and neighb...

Journal: :Japanese journal of infectious diseases 2012
Ying-Hui Shi

Hepatitis B virus (HBV) has been classified into 10 genotypes (A-J) according to genome sequence divergence. HBV genotypes have a distinct geographical distribution. As chronic HBV infection is endemic in the Asian region, genotypes B and C prevail there, and genotypes A and D are mainly found in the western world and Europe. Genotypes A, B, C, and D have been studied most extensively. In Europ...

Journal: :iranian journal of virology 0
a ghaziasadi hepatitis b molecular laboratory, department of virology, school of public health, tehran university of medical sciences, tehran, iran m ziai department of internal medicine, birjand university of medical sciences, birjand, iran m norouzi department of internal medicine, birjand university of medical sciences, birjand, iran r malekzadeh digestive disease research center, shariati hospital, tehran, iran sm alavian baqiyatallah university of medical sciences, baqiyatallah research centre for gastroenterology and liver disease, tehran, iran m judaki hepatitis b molecular laboratory, department of virology, school of public health, tehran university of medical sciences, tehran, iran

background and aims: the aim of this study was to determine the correlation between the hepatitis b virus surface ag (hbsag) genotypes and variations in the clinical/serological pictures among hbsag positive chronic patients from south khorasan province of iran. methods: twenty-five patients were enrolled in this study. the hbs ag gene was amplified and was directly sequenced. genotypes and nuc...

2013
Yongmei Zhang Chenxiao Li Yijun Zhang Haoxiang Zhu Yaoyue Kang Hongyan Liu Jinyu Wang Yanli Qin Richeng Mao Yi Xie Yuxian Huang Jiming Zhang

DNA methylation is being increasingly recognized to play a role in regulation of hepatitis B virus (HBV) gene expression. The aim of this study was to compare the CpG island distribution among different HBV genotypes. We analyzed 176 full-length HBV genomic sequences obtained from the GenBank database, belonging to genotypes A through J, to identify the CpG islands in the HBV genomes. Our resul...

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