View clinical trials related to Dengue Fever.
Filter by:RT-PCR and virus isolation are considered gold standard for diagnosis of Dengue from blood during first few days of infection. Serological methods such as enzyme-linked immunosorbent assays (ELISA), confirms the presence of a recent or past infection with detection of NS1 antigen and anti-dengue antibodies. However, these methods are time-consuming and need significant laboratory infrastructure, including instrumentation, trained personnel and refrigeration for reagents. Hence, in areas where DENV is endemic, have limited resources and inadequate laboratory capacity to perform these tests, rapid diagnostic tests (RDTs) can be used for quick and simple screening. Recently various RDTs which detect Antigen (NS1) and Antibodies (IgM and IgG) in single format are widely available and in use, but the performance data are not available or not consistent from one study to another. Therefore, this study aims to evaluate the sensitivity and specificity of different RDTs that detect antigens and antibodies to Dengue viruses in one cassette during acute febrile stage thereby helping healthcare providers to decide on the best test.
Background: Zika, dengue, and chikungunya are spread by mosquitos. These diseases have a major impact on public health. This is especially true in in Southeast Asia. Non-human primates (such as macaques) could play an essential role in spreading these diseases. Researchers want to further understand the relationship between humans and these primates. They want to see how this affects how mosquito-borne viruses are spread in Southeast Asia. Objective: To describe the prevalence of Zika virus, dengue virus, and chikungunya virus in the blood of people who live close to long-tailed macaques in Thailand and Cambodia. Eligibility: Healthy people aged 18-55 who have lived or worked within approximately 10 kilometers of the Wat Amphae Phnom monkey habitat in Kampong Speu, Cambodia, for a minimum of 2 years Design: Participation will last 1 day. Participants will be screened in person through an interview. Their medical history will be reviewed. Participants will give information about themselves. This will include sex, age, and behaviors related to the spread of mosquito-borne disease. For example, they will be asked about the number of water containers at their home. They will be asked about recent travel. They will be asked about the extent of their contact with the macaques. Participants will give a blood sample....
The purpose of the study is to demonstrate the non-inferiority (NI) of the immune response to 2 doses of 9vHPV vaccine, 1 co-administered with TDV, compared with 2 doses of 9vHPV vaccine administered alone.
The purpose of this study is to describe antibody persistence for each of the 4 dengue serotypes for up to 63 months after the first vaccination in the primary vaccination series for participants from parent trial DEN-315 (NCT03341637) (Mexico) and for up to 36 months after the first vaccination in the primary vaccination series for participants from parent trial DEN-304 (NCT03423173) (United States [US]) and to describe the impact of a tetravalent dengue vaccine (TDV) booster dose vs placebo on antibody response for each of the 4 dengue serotypes at 1 month and 6 months post administration of the TDV booster or placebo.
The purpose of this study is to evaluate the safety and immune response of a naturally aged lot of tetravalent dengue vaccine (TDV) in healthy participants, aged 18 to 60 years, in non-endemic country(ies) for dengue.
The purpose of this study is to assess the neutralizing antibody response against each dengue serotype post-vaccination.
To test whether Karius Infectious Disease Diagnostic Sequencing assay can detect Dengue Virus in plasma from suspected cases of Dengue or Dengue Fever like-illnesses from samples collected as part of a hospital-based multi-site study conducted in Nepal.
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.
The purpose of this study is to investigate lot-to-lot consistency in terms of equivalence of the immune responses induced by 3 consecutive TDV lots in healthy participants aged 18 to 60 years in non-endemic country(ies) for dengue.
The aim of the study was to assess the safety and immunogenicity of the CYD dengue vaccine and Gardasil (Human Papillomavirus Quadrivalent [Types 6, 11, 16, and 18] Vaccine, Recombinant) when administered concomitantly or sequentially. Primary objectives: - To demonstrate that the humoral immune response (in terms of geometric mean titers [GMTs]) to Gardasil after concomitant administration was non-inferior to sequential administration with the CYD dengue vaccine measured 28 days after the last dose of Gardasil. - To demonstrate that the humoral immune response to the CYD dengue vaccine after concomitant administration was non-inferior to sequential administration with Gardasil measured 28 days after the last dose of the CYD dengue vaccine. Secondary Objectives: - To demonstrate that the humoral immune response (in terms of seroconversion) to Gardasil vaccine after concomitant administration was non-inferior to sequential administration with the CYD dengue vaccine measured 28 days after the last dose of Gardasil. - To describe the humoral immune response to Gardasil at baseline and after each dose of Gardasil in each and any group. - To describe the humoral immune response to the CYD dengue vaccine at baseline and after each dose of the CYD dengue vaccine in each and any group. - To describe the safety of Gardasil and the CYD dengue vaccine after each and any dose in each group.