Natural vertical transmission of dengue virus in aedes aegypti and. Dengue virus infection in africa endemic areas of asia and the americas 19. Dengue fever is a virus transmitted to humans through bites from the aedes mosquito, a daybiting mosquito. Each denv has four or more genetic groups or genotypes. Dengue fever, west nile and zika viruses spread by. Dengue is among the most important mosquitoborne viral disease in the world. It takes a week or more for the dengue virus to replicate in the mosquito. Vasilakis states that this particular serotype is responsible for only one outbreak in humans, thus far this is the first dengue serotype to have been discovered in fifty years. The mosquito becomes infected when it bites a person who has dengue virus in their blood.
The virus is transmitted to humans by infected female feeding mosquitoes of the aedes genus, mostly aedes aegypti or aedes albopictus. Each year, an estimated 390 million people are infected. Detection of all four dengue serotypes in aedes aegypti female. People get dengue from the bite of an infected mosquito. The disease is caused by four serologically and genetically distinct viruses termed dengue virus denv 1, 2, 3 and 4. Dengue fever, west nile and zika viruses spread by mosquitoes and nutritional method to ossibly stop dengue from being fatal. It is clinically manifested as a subclinical infection, with undifferentiated fever the socalled dengue fever, and in a small number of individuals the dengue hemorrhagic fever dengue shock syndrome. Dengue fever is common in tropical areas, so take extra precautions if you travel somewhere with this type of climate. Dengue is believed to infect 50 to 100 million people worldwide in a year. Dengue fever df is the fastest emerging arboviral infection spread by aedes aegypti mosquitoes with major public health consequences for millions of people around the world, and in particular the southeast asia and asiapacific regions of the world health organization who. Pdf description of the epidemiology of dengue in colombia since the 1970s to. Denv in mosquitoes was detected in 74% of the analysed settlements with a pool positivity rate of 62%.
Silent circulation of dengue virus in aedes albopictus diptera. A risk to anyone traveling to a tropical or subtropical region of the world where dengue virus is found. This disease used to be called breakbone fever because it sometimes causes severe joint and muscle pain that feels like bones are breaking. In the last 50 years, dengue incidence has increased 30fold, worldwide.
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