Active clinical trials for "Hepatitis B"

The purpose of this early access protocol is to provide access to adefovir dipivoxil prior to its commercial availability to people with lamivudine-resistant chronic hepatitis B who have limited treatment options.

This study will determine the amount of liver scarring (fibrosis) or liver damage in people infected with 1) hepatitis B virus (HBV, a virus that can infect the liver); 2) HIV (the virus that causes AIDS); 3) both HBV and HIV; and 4) neither HBV nor HIV. Liver fibrosis and liver damage can have many causes, including alcohol, certain medicines, exposure to some contaminated foods and infections with viruses that affect the liver (such as HBV). About 25 million people in sub-Saharan Africa are infected with HIV and about 50 million with chronic HBV, yet very little information is available on how many people are infected with both viruses and the medical implications of co-infection. Participants in Uganda s Rakai Health Sciences Program (RHSP) or Infectious Diseases Institute (IDI) clinic who are 18 years of age or older may be eligible for this study. People enrolled in the study come to the clinic for at least one visit and may be asked to return yearly. During the visit, participants undergo the following procedures: Questionnaire and a short interview about their health and quality of life. Physical examination and blood draw. The blood is tested for HBV and other factors that may suggest liver disease. Blood drawn at previous clinic visits or from other studies may also be tested. Liver evaluation using a FibroScan, a medical device that uses elastic waves to measure liver stiffness in a process similar to ultrasound scanning. For this test, the subjects lies flat on the back with the arm extended out. The tip of the machine s probe is covered with gel and placed on the skin between the ribs at the level of the right lobe of the liver. The machine produces a little tap on the skin that sends a wave out and checks how fast the wave moves. The speed of the wave indicates the amount of scarring in the liver.

The aim of this study is to prove usefulness of contrast-enhanced ultrasound (CE-US) using Sonazoid (TM) in the early detection of HCC as compared with conventional B-mode ultrasound (B-mode US) for hepatitis virus related cirrhosis, who are defined as super high-risk patients for hepatocarcinogenesis,Furthermore, to analyze whether early detection of HCC by CE-US has a survival benefit than that by B-mode US.

People in Administrative Detention Centers often come from areas of medium or high HIV, hepatitis C & B endemic, and are often unaware of their serological status. Currently, HIV, hepatitis C & B screening is not systematically performed at the CRA of Nîmes, and when performed, serological tests are used. The main disadvantage of this method is the length of time it takes to obtain the results, with subjects frequently discharged before receiving their results. To improve the care of these vulnerable persons, the aim of this study is to estimate the prevalence of HIV, hepatitis C and hepatitis B in the detainees of the administrative detention center of Nîmes, by systematically screening with a rapid diagnosis test. In case of a positive rapid diagnosis test test, a serology test will confirm the rapid diagnosis test result.

This is a clinical study for GC1102 to demonstrate preventing the recurrence of hepatitis B virus (HBV) infection following liver transplantation and a dose-finding study to determine its optional dose.

The aim of this study is to evaluate the prevalence of hepatitis B in Vallés Occidental. Also, describe the stage of the disease, and whether if they are under medical treatment or not.

This study will assess the seroprevalence of hepatitis A virus (HAV), hepatitis B virus (HBV) and Bordetella pertussis (B. pertussis) in adolescents and young adults in Mexico.

This is a prospective HIV cohort that aims to establish causes of liver disease among HIV-infected individuals in Zambia, including viral hepatitis and alcohol.

HBV-related acute-on-chronic liver failure (HBV-ACLF) deteriorates rapidly with a high short-term mortality. Early identification and accurate prognostic prediction was critical to improve survival rate. This study was sought to determine the liver volumetry as predictor for short-term mortality in HBV-ACLF and develop a simpler prognostic model based on liver morphology. Liver volumetry were determined from CT at admission. Univariate and multivariate logistic regression were used to identify the optimum prognostic indicators and develop prognostic model. Additionally, receiver operating characteristic curves were analyzed to evaluate the predictive ability of the model.

Immunosuppression induced by cancer treatment increases the risk of hepatitis B virus (HBV) and hepatitis C virus (HCV) reactivations. These viral reactivations may be asymptomatic but can cause fulminant hepatitis and death. More, they impact the treatment of cancer by chemotherapy delays or stops. They can occur during cancer treatment but also after stopping, at the immunological rebound. This risk persists for at least 6 months after cessation. The key to the prevention, and the first step, is serological testing. It is also the main problem because international recommendations diverge. Hepatologists and infectious disease specialists recommend routine screening HBV of all candidates for immunosuppressive therapy. These recommendations are more implemented by hematologists, given the frequency of HBV reactivation associated to haematological malignancies. Clinical oncology societies guidelines suggest a selective screening in case of risk factors of hepatitis B or in patients with a strong immunosuppression (such as anti-CD20 based treatment, stem cell transplantation or lymphoma treatment). The consequence of these differences is a sub-screening by oncologists and the persistence of fatal cases. Screening before cytotoxic chemotherapy for solid tumors in countries with low prevalence of HBV and HCV virus is questionable. Selective screening of patients at risk HBV and HCV can be assessed.