View clinical trials related to Chikungunya Fever.
Filter by:This study will evaluate subjects with fever and/or rash to determine the percentage of those infected by the Zika, Chikungunya, or Dengue virus. The study will also compare the clinical signs, symptoms, and lab abnormalities related to each virus, to better specify each virus's characteristics.
Background: Zika virus is mostly passed on by the bite of an infected mosquito. It usually causes mild illness. But in pregnant women it can cause serious birth defects to the baby. The virus can also spread by blood transfusion and sexual intercourse. This is why the U.S. Food & Drug Administration (FDA) recommended that people should not give blood if possibly exposed to Zika virus. Dengue virus and chikungunya virus are passed by the same mosquitoes as Zika virus. These can cause severe reactions if passed through transfused blood. Donated blood is usually not tested for these three viruses. Researchers want to count the infections in people who have been exposed because of travel or sexual exposure. They want to learn the risk these viruses might pose to the U.S. blood supply. They also want to study the natural history of these viruses by following infected people over time. Objective: To study the risk of Zika, dengue, and chikungunya viruses to the U.S. blood supply. Eligibility: Adults age 18 or older who were turned down for donating blood because of possible exposure to certain viruses. Design: Participants will have blood and urine tests. They will answer questions about their travel. They will be called in about a week with virus test results. Participants with negative results do not have any more study visits. Participants with positive results will be asked to stay in the study for 6 months. They will have weekly clinic visits and tests until results are negative for 2 straight weeks. Once test results are negative, they will have monthly visits. Visits will include physical exams, blood and urine samples, and optional semen samples from men. Most people will have 3-4 weekly visits and 5 monthly visits.
This is a multicenter, randomized, placebo-controlled, double-blind study to evaluate the safety and immunogenicity of a 2-injection vaccine Chikungunya virus (CHIKV) virus-like particle vaccine (CHIKV VLP) in healthy adults.
Late 2013, the first indigenous cases of chikungunya have been observed in the French Antilles. At the end of May 2014, almost all of the islands of the Caribbean were affected by the outbreak. During the large epidemic which affected the Island of La Réunion in 2005/2006, the attack rate was 38%. The most active period was three months. In this context, knowledge of the attack rate and the epidemic in the Caribbean is an important issue for outbreak management and modeling work. As the chikungunya virus had never circulated in the Caribbean, determining the seroconversion rate can be achieved by realizing a seroprevalence survey among the general population at the end of the outbreak. Another simple method is to estimate the rate in a cohort of patients followed regularly and whose habitat is distributed throughout the territory studied. The follow up of patients infected by the human immunodeficiency virus (HIV) in the French West Indies is almost exclusively performed in hospitals in department of Infectious and Tropical Diseases.The high prevalence of HIV and homogeneous distribution of infected patients on all of our territories, allow to hypothesize that the risk of transmission of arboviruses by exposure to mosquito bites is comparable to the general population. This patient cohort is well suited to study the emergence of Chikungunya in the French West Indie . Primary objective : To estimate the cumulative incidence at the end of the first Chikungunya outbreak in the French West Indies by estimating the prevalence of specific antibodies of chikungunya virus in a sample (randomly constituted) from patients infected by HIV and representative of the general population of Martinique and Guadeloupe Secondary objective : To estimate the frequency of asymptomatic infections by the chikungunya virus in the studied population To estimate the frequency of chronic forms of chikungunya in the studied population
Chikungunya is a mosquito-borne viral illness that leads to chronic joint pain in approximately one half of patients. The mechanisms leading to long term arthritis in humans has not been well established. There is some evidence from animal studies that activated macrophages with persistent viral infection may play a role in chronic arthritis however these mechanisms have not yet been identified in humans. It is hypothesized that activated macrophages harboring persistent active chikungunya virus are responsible for chronic arthritis and joint pain in patients. The focus of this proposal is to evaluate synovial fluid and blood for direct viral persistence and activated macrophages that may clarify the mechanism of inflammatory injury. The results of this study will be directly applicable to tailoring trials of therapeutics.
The rationale for a Treatment Use Investigational Device Exemption (IDE) of INTERCEPT PCs is to address current gaps in platelet transfusion safety in selected geographic regions. The objective is to provide access to INTERCEPT PCs for patients who might be at risk of transfusion-transmitted infection (TTI) due to Chikungunya virus (CHIKV) and Dengue virus (DENV) in regions in which a substantial proportion of the population has been infected or is at risk of infection by these pathogens (Petersen 2014); and the risk of asymptomatic infection among qualified blood donors is recognized (Stramer 2012, Adda 2014). The study is designed as a prospective, open label, multi-center, observational study to evaluate the safety and efficacy of INTERCEPT platelet components.
This test is to be collected during the dengue outbreak samples, including samples back in the past and forward to close the case, investigating the prevalence of serum Chikungunya virus infection, and against those suspected dengue fever, Chikungunya disease-related tests conducted to clarify dengue and Chikungunya disease of clinical judgment, rapid method to detect Chikungunya virus and then develop.
Background: - Chikungunya virus (CHIKV) is transmitted by mosquitoes. It can cause fever, headache, muscle pain, fatigue, and joint pain. The disease usually does not cause death. But the joint pain, which may be directly related to the infecting virus, may be severe and last for several months. CHIKV outbreaks are most common in Africa, India, and Asia. A new experimental vaccine for CHIKV has been developed, and researchers are testing it in healthy adults. Participants cannot develop CHIKV from this vaccine. Objectives: - To test the safety and effectiveness of a Chikungunya virus vaccine. Eligibility: - Healthy individuals between 18 and 50 years of age. Design: - This study, including vaccine doses and followup tests, will last about 44 weeks. Participants will have three vaccination visits, six followup clinic visits, and three telephone contacts during this study. Vaccination visits will take about 4 hours. Most other clinic visits will usually take 2 hours. The telephone contacts will take about 15 minutes. - Participants will be screened with a physical exam and medical history. Blood samples will also be collected. - Participants will be assigned to one of three dose groups. Information about doses will be provided before the start of the vaccinations. - Vaccine injections will be given at the start of the study, at 4 weeks, and at 20 weeks. Participants will be asked to keep an eye on the injection site for 7 days and to notify researchers if there are any side effects. - Participants will be monitored throughout the study with blood samples and clinic visits.