Global Distribution and Prevalence of Hepatitis C Virus Genotypes
نویسندگان
چکیده
UNLABELLED Hepatitis C virus (HCV) exhibits high genetic diversity, characterized by regional variations in genotype prevalence. This poses a challenge to the improved development of vaccines and pan-genotypic treatments, which require the consideration of global trends in HCV genotype prevalence. Here we provide the first comprehensive survey of these trends. To approximate national HCV genotype prevalence, studies published between 1989 and 2013 reporting HCV genotypes are reviewed and combined with overall HCV prevalence estimates from the Global Burden of Disease (GBD) project. We also generate regional and global genotype prevalence estimates, inferring data for countries lacking genotype information. We include 1,217 studies in our analysis, representing 117 countries and 90% of the global population. We calculate that HCV genotype 1 is the most prevalent worldwide, comprising 83.4 million cases (46.2% of all HCV cases), approximately one-third of which are in East Asia. Genotype 3 is the next most prevalent globally (54.3 million, 30.1%); genotypes 2, 4, and 6 are responsible for a total 22.8% of all cases; genotype 5 comprises the remaining <1%. While genotypes 1 and 3 dominate in most countries irrespective of economic status, the largest proportions of genotypes 4 and 5 are in lower-income countries. CONCLUSION Although genotype 1 is most common worldwide, nongenotype 1 HCV cases—which are less well served by advances in vaccine and drug development—still comprise over half of all HCV cases. Relative genotype proportions are needed to inform healthcare models, which must be geographically tailored to specific countries or regions in order to improve access to new treatments. Genotype surveillance data are needed from many countries to improve estimates of unmet need.
منابع مشابه
Distribution of Genotypes of B and C Hepatitis Viruses in Guilan Province
Today, chronic viral hepatitis is considered as a public health problem in the world. Totally, 5% of the world population, especially in Asia and Africa suffer from this problem. The prevalence of acute hepatitis in America is 0.1-0.2 percent, 50% of those with hepatitis C (HCV) and 5-10% of them with hepatitis B (HCV) develop chronic hepatitis. Determining HBV and HCV genotypes is important to...
متن کاملDistribution of Hepatitis C virus genotypes in Yazd, Central Province of Iran: increasing the mixed genotypes
Background and Aims: Different hepatitis C virus (HCV) genotypes have characteristic geographical distribution. Identification of HCV genotype is an important factor in the progression, clinical outcome and therapy of HCV infection. The aim of this study was to determine the prevalence of HCV genotypes among HCV-RNA positive patients in Yazd, Iran. Materials and Methods: In this cross-sectiona...
متن کاملDistribution of Hepatitis B Virus (HBV) Genotypes among HBV Carriers in Isparta
The aim of this study was to investigate the prevalence of hepatitis B virus (HBV) genotypes in Isparta, Southwest of Turkey, as well as the clinical features and transmission route for patients with HBV infections. Methods: Patients (n = 135) with HBV infection were included in the study. Epidemiological and clinical data were obtained. HBV genotypes were determined with a preS2 epitope ELISA ...
متن کاملبررسی ژنوتیپ‌های ویروس هپاتیت C در مراجعین به کلینیک مرجع استان یزد
Introduction: Determining virus genotype is a major factor for initiation of treatment because various kinds of genotypes need different antiviral drugs. Distribution of hepatitis C genotype in the word is variable in each country or even in each province. So we need to determine distribution pattern of hepatitis C genotype in our region. This study was performed in referral clinic of Yazd prov...
متن کاملThe Relationship between Hepatitis C Genotypes and Viral Load: a study on hepatitis C patients in Kerman, Iran using Real-time PCR
Abstract Background: Distribution of hepatitis C virus genotypes varies geographically and can be associated with clinical aspects. The virus has six major genotypes and eleven sub-genotypes. According to the recent studies, in hepatitis C patients, treatment duration and ribavirin dosage should be determined based on the type of virus genotype. Be...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره 61 شماره
صفحات -
تاریخ انتشار 2015