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terça-feira, 6 de maio de 2014

Dengue

Dengue is an infectious tropical disease caused by the dengue virus, an arbovirus of the family Flaviviridae, genus Flavivirus and immunological includes four types: DEN-1, DEN-2, DEN-3 and DEN-4.1 Symptoms include fever, headache , muscle and joint pains and a characteristic skin rash that is similar to that caused by measles. In a small proportion of cases, the disease can progress to dengue hemorrhagic fever life-threatening, resulting in bleeding, low levels of blood platelets, blood plasma leakage or even lowering blood pressure to dangerously low levels.






Signs and symptoms


Typically, people infected with dengue virus are asymptomatic persons (about 80%) or only have mild symptoms such as a simple fever. Other patients have the disease more serious manner (5%) and a small proportion have a risk of death. The incubation period (time between exposure and onset of symptoms) ranges from 3 to 14 days, but most often it is 4-7 days. Thus, it is suspected that travelers who return from endemic areas have dengue if they have fever, or other characteristic symptoms, which begin to emerge from 14 days after return. Children often present similar symptoms to the common cold and gastroenteritis (vomiting and diarrhea) and 18 have a higher risk of serious complications, although the initial symptoms are usually mild, they include high fever.

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