Active clinical trials for "Hepatitis A"

Evaluate the potential of ART combined with interferon therapy to achieve functional cure of hepatitis B in HIV/HBV co-infected patients

The Australian Hepatitis and risk survey in prisons (AusHep) is a national prison-based blood-borne virus (BBV) surveillance study. This biobehavioural survey involves point-of-care testing for hepatitis C (HCV) antibodies and RNA (if antibody positive), hepatitis B surface antigens, hepatitis B surface antibodies, and HIV surface antibodies, and an interview-style survey on prior testing and treatment history and engagement in risk behaviours. The study will recruit approximately 2400 prisoner participants from 25 representative prisons across Australia, annually.

This is a two-way (retrospective and prospective) study of COVID-19 infection in an observational cohort of patients with chronic hepatitis B treated with antiviral therapy. Patients with chronic hepatitis B who received anti-HBV treatment in the Second Department of Hepatology, Beijing Ditan Hospital Affiliated to Capital Medical University from February 2022 to December 2023 were enrolled. After enrollment, demographic data of patients, information on antiviral treatment of chronic hepatitis B, COVID-19 vaccination, COVID-19 infection and COVID-19 incidence and treatment from January 2022 to pre enrollment, and data on HBV virus and serology, clinical biochemistry, liver and lung imaging, COVID-19 nucleic acid and COVID-19 antibody examination of patients were collected. After enrollment, prospective anti-HBV treatment, HBV virology, clinical biochemistry, liver imaging and COVID-19 infection and morbidity were observed. The patients with COVID-19 infection during the prospective observation period were observed for COVID-19 infection, onset and treatment, including body temperature, clinical symptoms, signs, cardiac examination, pulmonary imaging, COVID-19, clinical biochemistry, disease severity, time of virus negative conversion, hospital stay and outcome. The influence of COVID-19 infection on liver disease and the influence of interferon anti-HBV treatment on COVID-19 infection, its pathogenesis and prognosis were studied.

The most common mode of HBV transmission is materno-fetal transmission mainly during labor. This study aims to estimate the seroprevalence of HBV infection and the possible risk factors of HBV acquisition in pregnant women in Upper Egypt and to evaluate the predictive value of HBeAg and quantitative HBsAg as surrogate markers for high viremia in pregnant women.

This is a non-interventional retrospective multi-center study for the patients received Entekavir or TDF for Hepatitis B prophylaxis.

This study is aimed to collect and analyze clinical data of patients with chronic viral hepatitis in the real world, to investigate the long-term outcome of these patients and to optimize treatment options based on these data.

CR-HepB registry started in June 30,2012 to collect HBV cases from general hospitals or specialized hospitals for infectious diseases in mainland China. Demographics, diagnosis, laboratory test results, family history and prescriptions were recorded. The main criteria for registration is HBsAg-positivity more than 6 months, and these patients will receive followed-up visits every three to six months.

Hepatitis B virus (HBV) can be asymptomatic for years but can also lead to chronic hepatitis, hepatocellular carcinoma, and liver failure and death and cannot be eradicated with the current therapy. Chronic maternal HBV infection is an important source of perinatal transmission in regions of high HBV prevalence. In antenatal clinics at Shoklo Malaria Research Unit (SMRU), the Hepatitis B (HB) surface antigen (sAg) prevalence is 8.3% with a HB e-antigen (HBeAg) prevalence of 32.7% in those positive for HBsAg in 2012-2014. Perinatal infection occurs in 70-90% of women with HBeAg positive chronic HBV compared with 0-30% in those with HBeAg negative chronic HBV (inactive carriers). These infection rates reflect, in part, the failure of maternal and child health programs to prevent perinatal transmission with hepatitis B immunoglobulin (HBIG) and HB vaccines. Prevention of mother to child transmission (PMTCT) fails in an estimated 8-32% of cases with adequate preventive techniques. Antiretrovirals, like tenofovir (TFV) that is administered as the prodrug Tenofovir Disoproxil Fumarate (TDF), are active against HBV and may reduce the risk of HBV transmission at birth if offered at the right time in pregnancy. One of the major gaps in implementing this strategy is adequate pharmacokinetic (PK) data in pregnant women that informs correct dosing. One recently published population PK study in 154 women who provided maternal blood samples (32 and 36 weeks of pregnancy, at delivery, and at 1 and 2 months post-partum) reported a tenofovir area under curve (AUC) 0-24 that was estimated to be 20% (95% CI, 19-21%) lower during pregnancy than during post-partum suggesting no dose adjustments are needed in 3rd trimester. Most PK studies for TDF in pregnancy have been for Human Immunodeficiency Virus type 1 (HIV-1) infections. However, these patients often receive additional antiretroviral medications, preventing conclusions on PK parameters of Tenofovir (TFV) alone. Doses that are optimal for HIV may not be appropriate for HBV. When TDF is administered during pregnancy and potentially during lactation, it is important to establish the infant drug exposure. Previous human studies have shown that antiretrovirals administered to lactating mothers are present in the breast milk and have detected a low TDF breast milk concentration representing 0.03% or less of the proposed infant dosage. However, there is no data on this subject in therapeutic treatment of HBV infected women. In resource poor settings TDF administration will be ceased after 1 month post-partum. While there is some understanding of what happens to viral load post cessation in non-pregnant individuals, post-partum TDF cessation is less well understood and may be affected by differences in immunity. With breastmilk as the primary source of nutrition for babies in resource limited settings, it is important to know the viral exposure from breastmilk, if any, as these settings may also have problems achieving birth dose, HBIG and completion of the recommended three doses of vaccine. The investigators propose a dense PK study of once daily TDF 300 mg during pregnancy given for PMTCT of HBV mono-infection. Tenofovir PK will be measured in maternal blood samples in steady-state, in the 2nd and 3rd trimesters and post-partum. The presence of HBV DNA in blood and breast milk will also be explored in women after cessation of treatment until 6 months post-partum.

Multicenter cohort study of individuals reporting behavioral risks of HIV acquisition, recruited among those presenting for testing for HIV and other sexually transmitted infections. Overarching goal: to study factors associated with uptake of HIV prevention and (re)testing services in medium-sized cities in Thailand. Primary objective: To estimate the incidence of HIV and other sexually transmitted infections (syphilis, chronic hepatitis B and C) among individuals presenting for retesting. Secondary objectives: To evaluate the uptake of pre-exposure prophylaxis To assess retention in the study To evaluate client HIV knowledge To describe HIV prevalence and characteristics of individuals newly diagnosed with HIV To describe characteristics of individuals at risk of HIV infection To assess the quality of the testing and referral services.

The purpose of this research study is to create a clinical database and bio-repository. To do this, we will obtain blood, urine, saliva, and stool samples (e.g., biological samples) and personal health information from you to use in future research studies related to alcoholic hepatitis or other diseases. Part of your blood sample will be used to extract your DNA. DNA is the genetic material that gives us unique characteristics. We are doing this research study because we are trying to find out more about how and why illnesses related to alcoholic hepatitis or other diseases occur in people. To do this, we will study the biological samples and personal health information from healthy and sick people. A "biological sample" is usually blood, but can be any body fluid. "Personal Health Information" includes such items as your name, age, gender, race, and/or your medical information. It can also include data from measurements and tests that you had while participating in another research study or that were done during the course of your regular medical care or doctor visits.