View clinical trials related to Encephalitis, Japanese.
Filter by:The purpose of this study is to determine whether there are persisting antibodies against Japanese Encephalitis 6 years after the last vaccination with IXIARO(R) and to adapt or confirm mathematical models accordingly.
The aim of this study is to further characterize the safety profile of IMOJEV®. Primary Objective: - To describe serious adverse events (SAEs, including adverse events of special interest [AESIs]) up to 60 days after administration of one dose of IMOJEV®. Secondary Objective: - To describe Grade 3 (severe) systemic Adverse Events (AEs) up to 30 minutes after administration of one dose of IMOJEV®.
This study has aim to describe the immune response to the second dose of Japanese encephalitis chimeric vaccine (JECV) in children previously vaccinated with one dose of JECV 5 years ago.
Epidemic viral diseases have become more prevalent in recent years. Among the various strategies to prevent such epidemics, vaccination is the most cost-effective. However, populations that are immunized are typically already exposed to multiple previous vaccinations or natural infections. Studies from this and other laboratories have revealed that pre-existing dengue antibodies can either inhibit or enhance subsequent dengue infection depending on the pre-existing antibody levels. While cross-reactive antibody is potentially pathogenic in dengue, how it impacts immune response to vaccination is unclear. Indeed, aggregated at the site of vaccination and the respective draining lymph nodes are antigen-presenting and immune regulatory cells that express Fc receptors and play pivotal roles in determining the magnitude and polarity of the immune response. Vaccine uptake by these antigen-presenting cells may thus be either inhibited or enhanced when vaccines are opsonized with cross-reactive antibodies. In view of the limited knowledge on how cross-reactive antibodies affect vaccination outcome, investigators propose here a study that exploits the known cross reactivity between Japanese encephalitis (JE) virus antibody and yellow fever (YF) vaccine. Investigators hypothesize that cross-reactive antibodies impacts antibody response to YF at the point vaccination in a concentration-dependent manner by altering both vaccine uptake and the innate immune response by antigen presenting cells. Investigators will structure an open label clinical trial on sequential vaccination with JE and YF vaccines, with different time intervals between vaccinations. This would test immune response to YF vaccination in subjects with different titer of cross-reactive JE vaccine-derived antibodies.
The aim of this study was to document the immunogenicity and safety of a booster dose of IMOJEV administered at least 12 months after the primary dose. Primary objective: - To describe the immune response to Japanese Encephalitis (JE) before and 28 days after a booster dose of IMOJEV administered at least 12 months after primary vaccination with IMOJEV. Exploratory objectives: - To describe the safety profile of a booster dose of IMOJEV® .
Japanese encephalitis is caused by a viral infection of the brain transmitted by the bite of an infected mosquito. Patients with Japanese encephalitis can rapidly develop worsening conscious level and seizures. Around a third will die from the infection and half of survivors have serious long-term neurological disability. The majority of those affected are children. There are many causes of viral encephalitis, however Japanese encephalitis virus is the most common cause worldwide with over 60,000 cases annually. It occurs over much of Asia and the geographical range is expanding. There is no specific treatment for Japanese encephalitis virus, although several have been trialed. In this study we examined the effect of a new treatment, called intravenous immunoglobulin, on children with Japanese encephalitis in Nepal. Prior studies have suggested intravenous immunoglobulin may neutralize Japanese encephalitis virus and suppress damaging inflammation in the brain. It has previously been used in individual cases but never examined in a randomized trial. There was recently a trial of IVIG in West Nile encephalitis in the United States, in which Professor Solomon was on the Scientific Advisory Committee. In this study we will look if intravenous immunoglobulin is safe in this context, and that this treatment may alter the way the immune system manages the infection. Therefore, in this pilot study we will test the hypothesis that IVIG can be safely given to children with suspected JE, with no increased risk of serious adverse events compared with placebo. The aim of this proposal is to conduct a pilot safety and tolerability randomized placebo controlled trial of intravenous immunoglobulin (IVIG) in patients with Japanese encephalitis, to explore the relationship between JEV viral load, pro-inflammatory markers called cytokines and blood brain barrier markers, and the effect of IVIG on these relationships.
The purpose of this study is to observe the occurrence of adverse events and seroconversion rate, geometric mean titres (GMTs) of live attenuated varicella vaccine，live attenuated JE vaccine and live attenuated varicella vaccine combined with live attenuated JE vaccine, respectively.
Establish non-inferiority of the immune response and evaluate the safety and tolerability of Rabies and Japanese Encephalitis (JE) vaccines given concomitantly or alone and according to either of 2 schedules for preexposure prophylaxis.
Japanese encephalitis (JE) live attenuated vaccine SA14-14-2 has been in use for more more than 20 years in Asia. JE vaccine SA14-14-2 is licensed in India and has been widely used since 2006. JE vaccines give protection by generating a neutralizing antibody response, but both naturally exposed persons and patients with JE also have T cell responses. Whether JE vaccine SA14-14-2 elicits T cell responses is unknown. This study tests the hypothesis that T cell responses are generated in response to JE SA14-14-2 vaccination. The aim of this study is to characterize T cell responses to JE vaccine SA14-14-2 in healthy people, and to investigate differences in T cell responses between natural exposure, vaccination and disease.
The proposed study is a four-arm double-blind randomized controlled single center trial to evaluate, by examining post-vaccination seroprotection titers, the lot-to-lot consistency of three lots of Japanese Encephalitis live attenuated SA 14-14-2 vaccine (LJEVac) manufactured in a new good manufacture practice (GMP) facility, and to establish non-inferiority of the new vaccine in comparison to a single lot of the same vaccine manufactured in the existing facility. The study aimed to enroll a total of 1,000 Bangladeshi infants aged 10 to 12 months. In addition to providing immunogenicity data, this study provided local safety data of JE live attenuated SA 14-14-2 vaccine among Bangladeshi children. This is the first step to secure licensure for this life-saving vaccine in Bangladesh as well as provide data to support WHO prequalification of JE live attenuated SA 14-14-2 vaccine.