Active clinical trials for "Hepatitis A"

This multicenter, prospective, observational study will evaluate the one-year outcomes in HBeAg positive chronic hepatitis B patients who had received Pegasys (peginterferon alfa-2a) in Arm A of study ML22265. Data will be collected from each patient for up to one year post-therapy.

This prospective observational study will investigate predictive values of virological response in pegylated interferon alfa-2a (Pegasys)/ribavirin (Copegus) treatment-naive participants with chronic hepatitis C. Participants will be treated with pegylated interferon alfa-2a and ribavirin as prescribed by the physician. Data will be collected for a maximum of 96 weeks.

The aim of this study is to prove the superiority of entecavir over lamivudine for preventing the risk of hepatitis B virus reactivation in patients with non-Hodgkin lymphoma on CHOP/R-CHOP.

Study of seroprevalence of hepatitis E among HIV positive patient in Basque country, France in 2016.

Background: - The hepatitis E virus causes an acute hepatitis that usually goes away by itself. Researchers in France studied people who received a liver or kidney transplant. They found that hepatitis E may not go away by itself in these people. It becomes chronic. This can cause serious liver disease. More than half the people who had organ transplant who had hepatitis E seemed to get a chronic infection. Researchers want to find out if hepatitis E happens this often in patients who have liver, kidney, or small bowel transplants in the United States. If it does, they want to know why. They want to know if chronic hepatitis E will become an important medical problem. This research might help improve care for people who have a transplant. It also might help researchers prevent the spread of hepatitis E. Objective: - To see how many patients who have received or are waiting for certain transplants have antibodies to hepatitis E virus. Eligibility: - Adults over age 18 who have had a liver, kidney, liver and kidney, or small bowel transplant, or are on a waiting list for one. Design: Participants will be enrolled from 3 transplant centers. Participants will complete a questionnaire. They will be asked about possible risk factors for hepatitis E exposure. Participants will have a blood sample drawn through a needle placed in a vein.

The aims of this study are to determine: the degree of immunity against hepatitis B, factors associated with immunity against hepatitis B, if the amount of antigen provided in a booster dose (used to measure the degree of immune memory) affects the body's response to the booster, and if the age at which the vaccination was initiated during infancy affects duration of protection against hepatitis B among adolescents 16-19 years of age born in the United States who were immunized against hepatitis B as infants. These data will be important to evaluate the potential need for a possible booster dose of hepatitis B vaccine among adolescents. Study subjects eligible for enrollment will: have blood drawn for baseline serologies receive the hepatitis B booster dose (randomly determined to be either a 10 ug or 20 ug dose) have blood drawn again 14 days later to determine if the booster dose has engendered an anamnestic response (a response attributed to prior immunity rather than a new response to the vaccine) The primary hypothesis is that the majority of young people will exhibit immune memory for hepatitis B in response to a booster dose of vaccine.

This observational study will evaluate predictors of early on-treatment response and sustained virological response in patients with chronic hepatitis C receiving Pegasys (peginterferon alfa-2a) and ribavirin. Data will be collected from patients on treatment (24 or 48 weeks) and 24 weeks after the end of treatment.

The purpose of the study is to 1- detect and quantify HCV-PI resistant mutants with ultra-deep pyrosequencing (UDPS) technology, 2 - detect SNPs in P-glyocoprotein and CYP3A genes, in HCV mono-infected patients under/after Telaprevir treatment.

The purpose of this study is to determine if there is an association between hepatitis C infection and kidney cancer. All patients who are diagnosed with kidney cancer and who will either have a biopsy or surgery will be offered to be tested for hepatitis C. The control group will be colon cancer patients. Both groups would be of recent diagnosis (6 months).

The objective of the study is to evaluate, in each group, the number of participants who achieve rapid virological response (RVR) after 4 weeks treatment with PegIntron and Rebetol. The study will also assess whether RVR is a reliable predictor of sustained virologic response (defined as undetectable viral load at 24 weeks post-treatment).