Topic
Dengue virus
About: Dengue virus is a research topic. Over the lifetime, 12671 publications have been published within this topic receiving 461406 citations. The topic is also known as: DENV.
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TL;DR: The results suggest that the EIP of DENV-2 in its vector may be shorter that the previously reported and that the tracheal system may facilitate DENV -2 dissemination from the midgut.
Abstract: Background
To be transmitted by its mosquito vector, dengue virus (DENV) must infect midgut epithelial cells, replicate and disseminate into the hemocoel, and finally infect the salivary glands, which is essential for transmission. The extrinsic incubation period (EIP) is very relevant epidemiologically and is the time required from the ingestion of virus until it can be transmitted to the next vertebrate host. The EIP is conditioned by the kinetics and tropisms of virus replication in its vector. Here we document the virogenesis of DENV-2 in newly-colonized Aedes aegypti mosquitoes from Chetumal, Mexico in order to understand better the effect of vector-virus interactions on dengue transmission.
413 citations
TL;DR: Subcellular localization of NS1 and localization of the dsRNA to the vesicle packets and cytoplasmic vacuoles seen in infected Vero and C6/36 cells, respectively, suggests that these structures may comprise the flavivirus replication complex.
412 citations
TL;DR: The basic biology of these viruses, their life cycles, the diseases they cause and available therapeutic options are reviewed, and the global distribution of flaviviruses is discussed, with a focus on lesser-known species that have the potential to emerge more broadly in human populations.
Abstract: Flaviviruses are vector-borne RNA viruses that can emerge unexpectedly in human populations and cause a spectrum of potentially severe diseases including hepatitis, vascular shock syndrome, encephalitis, acute flaccid paralysis, congenital abnormalities and fetal death. This epidemiological pattern has occurred numerous times during the last 70 years, including epidemics of dengue virus and West Nile virus, and the most recent explosive epidemic of Zika virus in the Americas. Flaviviruses are now globally distributed and infect up to 400 million people annually. Of significant concern, outbreaks of other less well-characterized flaviviruses have been reported in humans and animals in different regions of the world. The potential for these viruses to sustain epidemic transmission among humans is poorly understood. In this Review, we discuss the basic biology of flaviviruses, their infectious cycles, the diseases they cause and underlying host immune responses to infection. We describe flaviviruses that represent an established ongoing threat to global health and those that have recently emerged in new populations to cause significant disease. We also provide examples of lesser-known flaviviruses that circulate in restricted areas of the world but have the potential to emerge more broadly in human populations. Finally, we discuss how an understanding of the epidemiology, biology, structure and immunity of flaviviruses can inform the rapid development of countermeasures to treat or prevent human infections as they emerge. Flaviviruses, a group of vector-borne RNA viruses that includes dengue virus, West Nile virus, Zika virus and several lesser-known species, often emerge in human populations and cause epidemics. Here, Pierson and Diamond review the basic biology of these viruses, their life cycles, the diseases they cause and available therapeutic options. They also discuss the global distribution of flaviviruses, with a focus on lesser-known species that have the potential to emerge more broadly in human populations.
412 citations
TL;DR: The 3.7 Å resolution cryo-electron microscopy structure of ZIKV shows a virus with a more compact surface, which may help it to survive in the harsh conditions of semen, saliva and urine and to reduce the disease outcome or limit the spread of the virus.
Abstract: Shee-Mei Lok and colleagues provide a 3.7 cryo-electron microscopy view of Zika virus, revealing typical flavivirus architecture. They report that in contrast to the related flavivirus dengue virus, Zika virus is thermally stable at 40 C, and speculate that this structural stability may contribute to the ability of the virus to survive in semen, saliva and urine.
410 citations
TL;DR: It is shown that an epidemiological model of dengue transmission in travelers, based on mobility data from ∼40 million mobile phone subscribers and climatic information, predicts the geographic spread and timing of epidemics throughout the country.
Abstract: The recent emergence of dengue viruses into new susceptible human populations throughout Asia and the Middle East, driven in part by human travel on both local and global scales, represents a significant global health risk, particularly in areas with changing climatic suitability for the mosquito vector. In Pakistan, dengue has been endemic for decades in the southern port city of Karachi, but large epidemics in the northeast have emerged only since 2011. Pakistan is therefore representative of many countries on the verge of countrywide endemic dengue transmission, where prevention, surveillance, and preparedness are key priorities in previously dengue-free regions. We analyze spatially explicit dengue case data from a large outbreak in Pakistan in 2013 and compare the dynamics of the epidemic to an epidemiological model of dengue virus transmission based on climate and mobility data from ∼40 million mobile phone subscribers. We find that mobile phone-based mobility estimates predict the geographic spread and timing of epidemics in both recently epidemic and emerging locations. We combine transmission suitability maps with estimates of seasonal dengue virus importation to generate fine-scale dynamic risk maps with direct application to dengue containment and epidemic preparedness.
408 citations