Active clinical trials for "Dengue"

This is an observational study that aims to determine the effectiveness of a tetravalent dengue vaccine (CYD-TDV) when given through a community-based immunization program against hospitalized and /or severe virologically confirmed dengue.

The Integrated Management of Childhood Illness (IMCI) guideline has been implemented in Burkina Faso and is used across primary health facilities to assess children under the age of 5 years. A part from a rapid diagnostic test (RDT) for malaria, no other point of care in vitro diagnostic tests are widely used to improve disease diagnosis and inform treatment decisions. Dengue fever has been reported in Burkina Faso since 1925 and the recent epidemics in 2016 and 2017 have prompted the government to validate and deploy a clinical management algorithm for Dengue and a case reporting process to support surveillance for a targeted response. The organisation Terre des hommes has digitalised IMCI and implemented the module through its Integrated electronic Diagnosis Approach (IeDA) programme across primary health care centers (PHCs) in the country with proven impact on clinical care and proven reduction in antibiotic prescriptions. Many recognize the need to update the IMCI guideline with current evidence. However this is challenging and may require large clinical trials. The advantage of electronic clinical decision support systems is plural: they improve quality of care through increased adherence and feedback information to the system; they strengthen surveillance systems by connecting relevant patient related data and provide geo-tagged coordinates for targeted responses; and they can become evidence-adaptive. An electronic module of the Burkina Faso Dengue clinical management guideline accompanied with dengue rapid diagnostic tests has the potential to improve the diagnosis of non-malaria fevers in particular during "dengue seasons" and improve the efficiency of surveillance for this disease. In this study, the investigators aim to assess the usability and the performance of the dengue module for patient management in primary health care facilities.

The purpose of this study was to conduct a passive surveillance of hospitalized dengue cases in participants who participated in study CYD23 (NCT00842530). The Objectives: To describe the incidence of virologically-confirmed hospitalized dengue cases. To characterize hospitalized dengue cases. To evaluate the occurrence of related and fatal serious adverse events (SAEs).

Background: Some mosquitos carry viruses that can cause disease. Some examples are dengue and Zika. The mosquitos spread disease by biting people and infecting them with the virus. Children, elderly people, and people who are already sick are especially likely to get infected. Researchers want to learn more to help make new medicines to treat these viral infections. Objective: To learn more about how mosquitos infect people, and why young children are more likely to get sick than other people. Eligibility: Healthy children 2-9 years old who live near the study site. This is Kampong Speu District Referral Hospital in Chbar Mon, Cambodia. Design: At visit 1, participants will have a physical exam. A small amount of blood will be taken from their arm or finger. Parents will answer questions about the participant s general health and medical history. Participants will come back to the study site every wet season and every dry season for the next 3 years. The visits will be the same as visit 1 and take about 1 hour. If at any time during the study the participant gets a fever and has other symptoms that could be caused by these viral diseases, they should be brought to the study site. These symptoms might include headache, pain behind the eyes, muscle pain, or joint pain. They can also include a rash that lasts longer than 12 hours. Participation ends after the final study visit in late 2021.

Symptomatic dengue virus infection in pregnant women could affect the mother, fetus and the newborn at birth. The risks of postpartum hemorrhage, prematurity and low birth weight are increased in dengue fever. Cases of vertical transmission have been described. This study therefore proposes to quantify these risks in a pregnant woman presenting a clinical picture of dengue fever through a prospective, longitudinal and comparative study.

The purpose of this study is determine the ability of bedside ultrasound performed in the Emergency Department and Outpatient Department can predict the severity of disease during a Dengue Fever outbreak in children, in Siem Reap, Cambodia. Our hypothesis is that the presence of gallbladder wall thickening, pulmonary edema/effusions, ascites, pericardial effusion in children correlates with progression to more severe disease.

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.

Primary objectives: To assess how dengue vaccine efficacy varies across participant subgroups regarding polymorphism in human leukocyte antigen (HLA) alleles of interest. To assess the association between HLA alleles and, serotype-specific neutralization antibody titers and summary neutralization measure in the vaccine and placebo groups. To assess the association between the polymorphism in HLA alleles of interest and susceptibility to Dengue fever and Dengue Haemorrhagic fever. Secondary objectives: To assess whether dengue serotype-specific neutralizing antibody titers and associated summary neutralization measure at 28 days post-dose 3 are related to the rate of occurrence of symptomatic Virologically-confirmed dengue infection after post-dose 3 To evaluate whether the dengue serotype-specific neutralizing antibody and associated summary neutralization measure at 28 days post-dose 3 are related to the level of vaccine efficacy against dengue viruses after post-dose 3.

During dengue outbreaks, the Ministry of Health Malaysia employs various methods to control the spread of disease, including killing the larvae of Aedes mosquitoes, fogging, together with educating and disseminating information about the dengue outbreak, to the community. However, this is too late. Research has shown that when an outbreak has occurred, the viral infection has already spread among the community. Therefore, this current trial aims to educate the public (via questionnaire survey and interactions with the residential managements, mainly), detect dengue-infected mosquitoes, inform the communities of the presence of dengue-infected mosquitoes, followed by approaching and educating them to take precautionary measures before the outbreak happens. Trapping (using gravid oviposition sticky (GOS) traps) and detecting dengue virus non-structural 1 (NS1) antigen (using dengue NS1 kit) in the Aedes mosquitoes will be a more reliable way to alert the community before a potential dengue outbreak in their housing area. The community will receive information of presence of infected mosquitoes and probable dengue infections before dengue cases are reported. This will be an ideal time for clean-ups and for search and destroy activities. With this shift in approach and the use of newer techniques, it is hoped that deaths and epidemics due to dengue will be reduced.

World Health Organisation (WHO) has identified Dengue as the fastest spreading mosquito-borne disease in the world. This study follows on from the National Medical Research Council STOP Dengue Translational and Clinical Research flagship grant. Differential serum concentrations of alpha2-macroglobulin (A2M), chymase (CMA1) and vascular endothelial growth factor A (VEGFA) were discovered to accurately identify dengue patients who will develop severe disease from those who will not, prior to the development of severe complications. By identifying patients at risk of developing severe disease in advance, these patients can be monitored more closely to provide more timely fluid interventions, and hopefully further reduce fatality rate. At the same time, more patients who are not at risk can be managed as outpatients to further minimize unnecessary hospitalization costs and wastage of healthcare resources. After discovery of the Dengue prognostic biomarkers, a multivariate logistic regression predictive model was built from a small retrospective derivative cohort (50 subjects), followed by validation using a small prospective validation cohort (50 subjects). The model had a receiver operating characteristic (ROC) curve AUC (area under the curve) of 0.944, and a sensitivity and specificity of 90% and 91% during validation, respectively. The premise of this study is to validate our observations in a larger prospective cohort (200 subjects). At the same time, we would like to better understand the characteristics of the Dengue prognostic biomarkers, especially whether there are situations in which the biomarkers cannot predict Dengue Haemorrhagic Fever (DHF)/ Dengue Shock Syndrome (DSS) and/or Severe Dengue (SD) and how the biomarkers can further improve the cost-effectiveness of the clinical management of Dengue patients.