View clinical trials related to Virus Diseases.
Filter by:Avian influenza (AI), also known as bird flu, has become a major public health concern in many regions of the world. The purpose of this study is to evaluate the safety of and immune response to an AI vaccine in healthy adults.
This study will determine if an experimental vaccine to prevent Ebola virus infection is safe and what side effects, if any, it causes. Ebola virus infection may range from mild to severe, and may cause breathing problems, severe bleeding, kidney problems and shock that can lead to death. The vaccine used in this study contains man-made genetic material similar to one part of the Ebola virus, which is designed to stimulate an immune response to the virus. The vaccine itself cannot cause Ebola virus infection because it does not contain any Ebola virus. Participants are assigned to one of three groups as they enter into the study. Of the first 16 people in the study, 12 receive the lowest study dose of vaccine and 4 receive placebo (an inactive substance). If this dose is safe, then of the next 16 people who enter the study, 12 receive a higher dose of the vaccine, and the remaining 4 receive placebo. If this dose is safe, the final 12 people in the last group of 16 receive the highest study dose, and 4 receive placebo. The vaccine is given as a single injection in the arm on the day of enrollment. Participants keep a diary for 5 days, recording their temperature, symptoms and any reaction at the injection site. They call a study nurse the day after vaccination to report how they feel, and they return to the clinic approximately six times for follow-up evaluations. These visits may include a check of vital signs, physical examination, blood and urine tests, or other medical tests if needed.
Study Phase: IV Study Type: Open-label, multicenter, randomised clinical trial with two arms stratified for an intensified immunosuppressive regimen in patients at high risk for acute rejection. Study Description: 148 kidney transplant recipients at risk for CMV disease were randomized and treated with ganciclovir capsules for 3 months (Group A, prophylaxis, N=74) or received ganciclovir IV only in case of proven CMV viral load (Group B, preemptive therapy, N=74). Initially, a 2 months follow up was planned in this trial. However, the study group decided to offer a longterm follow up to all patients and amended the protocol, respectively. The aim of the study was to identify the most efficacious way to prevent renal transplant recipients from CMV disease and to find out, if one of these two strategies may increase graft or patient survival. Therefore, both wellknown approaches of CMV prevention were compared in two study groups: Prophylaxis (Group A): Oral primary prophylaxis with ganciclovir capsules was started directly after transplantation and performed until day 90. In case of CMV infection (proven CMV viral load) or symptomatic CMV disease, treatment with ganciclovir IV was initiated. Preemptive Therapy (Group B): No oral primary prophylaxis was given. Treatment with ganciclovir IV was given to patients with proven CMV viral load (CMV infection or CMV disease) only.
Human parainfluenza viruses (HPIVs) are a major health concern in infants and young children under 5 years of age, causing serious respiratory tract disease. The purpose of this study is to test the safety of and immune response to a new HPIV vaccine in healthy infants, children, and adults.
The purpose of this study was to compare the safety, tolerability, and antiviral activity of once-daily (QD) and twice-daily (BID) dosing of the lopinavir/ritonavir (LPV/r) tablet formulation in combination with nucleoside/nucleotide reverse transcriptase inhibitors (NRTIs) in antiretroviral-experienced human immunodeficiency virus type 1 infected subjects with detectable viral load while receiving their current antiretroviral therapy.
Avian influenza (AI), or bird flu, has recently become a major health concern in Asia and other parts of the world. The need for a vaccine to prevent the spread of AI among livestock and to humans is sorely needed. The purpose of this study is to test the safety of and immune response to a new AI vaccine in healthy adults.
Valaciclovir (VACV), the L-valyl ester prodrug of aciclovir (ACV), is extensively converted to ACV and L-valine after oral administration. In subjects with normal renal function, ACV is predominantly eliminated unchanged in the urine, with a small proportion metabolized to 9-carboxymethoxymethylguanine (CMMG). The metabolism of ACV to CMMG is thought to involve aldehyde dehydrogenase (ALDH). On the basis of a high proportion of the Japanese population having low-activity ALDH, it can be hypothesized that the conversion of ACV to CMMG is decreased, thereby leading, in patients with renal impairment, to higher plasma concentrations of ACV. This pilot study was conducted to investigate potential relationships between genetic polymorphisms of ALDH2, an isozyme of ALDH, and the plasma pharmacokinetics (PK) of VACV, ACV and CMMG in subjects with end-stage renal disease on hemodialysis.
The Viral Epidemiology Branch (VEB) of the National Cancer Institute (NCI) conducts research on viral infections and their associations with various diseases including AIDS and cancer. For some research questions, specimens are available from "case" subjects as part of ongoing protocols but are not available from normal "control" subjects (i.e., those without the infection or disease under study) to whom the case subjects can be compared. This protocol is to obtain routine specimens (usually peripheral venous blood, occasionally other body fluid such as saliva, urine, or tears) from healthy volunteers.
This study, conducted at the Johns Hopkins University School of Public Health in Baltimore, Maryland, will determine how accurately injection drug users report their needle-sharing behavior. Needle-sharing is a major cause of blood-borne diseases, including HIV and hepatitis. Therefore, a better understanding of this behavior is critical for devising strategies to reduce disease spread in this way. Research on needle-sharing behavior has relied heavily on users' self-reports. This study will compare these self-reports with results of DNA tests that show whether a needle has been used by one or more individuals. Injection drug users 18 years of age or older participating in the Baltimore Needle Exchange Program (BNEP) have been recruited for this study. Syringes distributed to users through the BNEP are collected after use and tested to differentiate between single versus multiple users. The findings are compared with the participants' responses about whether or not they shared their needles and syringes. Participants visit the clinic every 6 months for an interview, including questions about their mental and physical health, drug use, sexual activity and knowledge about HIV (the virus that causes AIDS) and AIDS. After the interview, a small amount of blood is drawn for testing for HIV, hepatitis, syphilis and other infectious diseases. Some of the blood is stored for future testing. Participants return to the clinic 4 weeks after the interview and blood drawing to get their test results. At this time, they are offered referral for drug treatment, free condoms, advice about drug use and safer sex and an opportunity to ask questions about their health. Participation in the study may continue for up to 5 years.
This is a Phase 2, randomized, double-blind study in which motavizumab (MEDI-524) and palivizumab were administered sequentially to high-risk children during the same respiratory syncytial virus (RSV) season. A control group was administered only motavizumab.