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Background: Infants account for a small proportion of the overall dengue case burden in endemic countries but can be clinically more difficult to manage. The clinical and laboratory features in infants with dengue have not been extensively characterised.
Methodology/principal Findings: This prospective, cross-sectional descriptive study of infants hospitalized with dengue was conducted in Vietnam from November 2004 to December 2007. More than two-thirds of 303 infants enrolled on clinical suspicion of dengue had a serologically confirmed dengue virus (DENV) infection. Almost all were primary dengue infections and 80% of the infants developed DHF/DSS. At the time of presentation and during hospitalization, the clinical signs and symptoms in infants with dengue were difficult to distinguish from those with other febrile illnesses, suggesting that in infants early laboratory confirmation could assist appropriate management. Detection of plasma NS1 antigen was found to be a sensitive marker of acute dengue in infants with primary infection, especially in the first few days of illness.
Conclusions/significance: Collectively, these results provide a systematic description of the clinical features of dengue in infants and highlight the value of NS1 detection for diagnosis.
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http://dx.doi.org/10.1371/journal.pntd.0000657 | DOI Listing |
Virology
September 2025
Department of Medicine, Democritus University of Thrace, Alexandroupolis, Evros, Greece.
Background: Dengue virus (DENV) is a major global health challenge, causing over 7.6 million reported cases in 2024. Neutralizing monoclonal antibodies (NmAbs) have emerged as promising therapeutics to address the limitations of vaccines and lack of antivirals, but their development is complicated by viral diversity, "breathing" dynamics, and antibody-dependent enhancement (ADE).
View Article and Find Full Text PDFBiophys J
September 2025
Department of Chemistry and Biochemistry, Alberta RNA Research and Training Institute, University of Lethbridge, 4401 University Drive, Lethbridge, AB, T1K 3M4, Canada; Li Ka Shing Institute of Virology, University of Alberta, Edmonton T6G 2E1, Alberta, Canada; Department of Microbiology, Immunology
The dengue virus (DENV) poses a significant threat to human health, accounting for approximately 400 million infections each year. Its genome features a circular structure that facilitates replication through long-range RNA-RNA interactions, utilizing cyclization sequences located in the untranslated regions (UTRs). To gain new insights into the organization of the DENV genome, we purified the 5' and 3' UTRs of DENV in vitro and examined their structural and binding properties using various biophysical techniques combined with computational methods.
View Article and Find Full Text PDFJ Travel Med
September 2025
Public Health Agency of Sweden, Solna, Sweden.
We describe a Qdenga-induced DENV-2-infection in a Swedish traveler. Comparative sequencing suggests that the vaccine contained a small fraction of identical virus as detected in the patient, suggesting a selection of a DENV-2-substrain with unusual amino acid substitutions. Further research on selection of, and possible effects of, Qdenga-substrain-infections is warranted.
View Article and Find Full Text PDFJ Travel Med
September 2025
Vaccine Trial Centre, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand.
Background: Although there is a rising trend in both dengue cases and immunocompromised conditions, there is limited research on how common severe dengue is in immunocompromised individuals. This data is key for those advising the ever-increasing numbers of immunocompromised travellers.
Methods: We conducted a systematic review and meta-analysis of studies reporting dengue frequency or outcomes in immunocompromised populations.
Int J Infect Dis
September 2025
Division of Infection and Immunity, University College London, London, United Kingdom; NIHR Biomedical Research Centre, UCL Hospitals NHS Foundation Trust, London, NW3 OPQ, United Kingdom. Electronic address: