BACKGROUND\nAs the incidence of dengue increases globally, US travelers to endemic areas may be at an increased risk of travel-associated dengue.\n\n\nMETHODS\nData from the US Centers for Disease Control and Prevention's laboratory-based Passive Dengue Surveillance System (PDSS) were used to describe trends in travel-associated dengue reported from January 1, 1996 to December 31, 2005. The PDSS relies on provider-initiated requests for diagnostic testing of serum samples via state health departments. A case of travel-associated dengue was defined as a laboratory-positive dengue infection in a resident of the 50 US states and the District of Columbia who had been in a dengue-endemic area within 14 days before symptom onset. Dengue infection was confirmed by serologic and virologic techniques.\n\n\nRESULTS\nOne thousand one hundred and ninety-six suspected travel-associated dengue cases were reported-334 (28%) were laboratory-positive, 597 (50%) were laboratory-negative, and 265 (22%) were laboratory-indeterminate. The incidence of laboratory-positive cases varied from 1996 to 2005, but had an overall increase with no significant trend (53.5 to 121.3 per 10(8) US travelers, p = 0.36). The most commonly visited regions were the Caribbean, Mexico and Central America, and Asia. The median age of laboratory-positive cases was 37 years (range: <1 to 75 y) and 166 (50%) were male. Of the 334 laboratory-positive cases, 41 (12%) were hospitalized, and 2 (1%) died.\n\n\nCONCLUSIONS\nResidents of the US traveling to dengue-endemic regions are at risk of dengue infection and need to be instructed on appropriate prevention measures prior to travel. Especially in light of the potential transmissibility of dengue virus via blood transfusion, consistent reporting of travel-associated dengue infections is essential.

Travel-Associated Dengue Infections in the United States, 1996 to 2005. Authors' reply

Dengue virus infection.

Dengue viruses (DENV) cause an estimated 390 million infections globally. With no dengue-specific therapeutic treatment currently available, vaccination is the most promising strategy for its control. A wide range of DENV vaccines are in development, with one having already been licensed, albeit with limited distribution. We investigated the immunogenicity and protective efficacy of a chimeric virus vaccine candidate based on the insect-specific flavivirus, Binjari virus (BinJV), displaying the structural prM/E proteins of DENV (BinJ/DENV2-prME). In this study, we immunized AG129 mice with BinJ/DENV2-prME via a needle-free, high-density microarray patch (HD-MAP) delivery system. Immunization with a single, 1 µg dose of BinJ/DENV2-prME delivered via the HD-MAPs resulted in enhanced kinetics of neutralizing antibody induction when compared to needle delivery and complete protection against mortality upon virus challenge in the AG129 DENV mouse model.

A chimeric dengue virus vaccine candidate delivered by high density microarray patches protects against infection in mice.

Dengue virus causes dengue hemorrhagic fever (DHF) and has been associated to fatal cases worldwide. The liver is one of the most important target tissues in severe cases, due to its intense viral replication and metabolic role. microRNAs role during infection is crucial to understand the regulatory mechanisms of DENV infection and can help in diagnostic and anti-viral therapies development. We sequenced the miRNome of six fatal cases and compared to five controls, to characterize the human microRNAs expression profile in the liver tissue during DHF. Eight microRNAs were differentially expressed, including miR-126-5p, a regulatory molecule of endothelial cells, miR-122-5p, a liver specific homeostasis regulator, and miR-146a-5p, an interferon-regulator. Enrichment analysis with predicted target genes of microRNAs revealed regulatory pathways of apoptosis, involving MAPK, RAS, CDK and FAS. Immune response pathways were related to NF- kB, CC and CX families, IL and TLR. This is the first description of the human microRNA and isomicroRNA profile in liver tissues from DHF cases. The results demonstrated the association of miR-126-5p, miR-122-5p and miR-146a-5p with DHF liver pathogenesis, involving endothelial repair and vascular permeability regulation, control of homeostasis and expression of inflammatory cytokines.

/pdf/differential-expression-analysis-and-profiling-of-hepatic-2fllq52wnr.pdf

Differential expression analysis and profiling of hepatic miRNA and isomiRNA in dengue hemorrhagic fever.

Developing a Stabilizing Formulation of a Live Chimeric Dengue Virus Vaccine Dry Coated on a High-Density Microarray Patch

https://link.springer.com/content/pdf/10.1007%2Fs12250-015-3624-1.pdf

Dengue epidemiology and pathogenesis: images of the future viewed through a mirror of the past

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Dengue epidemiology and pathogenesis: images of the future viewed through a mirror of the past