Monday, October 4, 2010

Hemorrhagic Dengue Fever

    Dengue is a mosquito-borne infection that causes a severe flu-like illness, and sometimes a potentially lethal complication called dengue hemorrhagic fever. Global incidence of dengue has grown dramatically in recent decades. About two fifths of the world's populations are now at risk.
    Dengue is found in tropical and sub-tropical climates worldwide, mostly in urban and semi-urban areas. Dengue hemorrhagic fever is a leading cause of serious illness and death among children in some Asian countries.

    There is no specific treatment for dengue, but appropriate medical care frequently saves the lives of patients with the more serious dengue hemorrhagic fever. The only way to prevent dengue virus transmission is to combat the disease-carrying mosquitoes.
    Dengue is a mosquito-borne infection that in recent decades has become a major international public health concern. Dengue is found in tropical and sub-tropical regions around the world, predominantly in urban and semi-urban areas.
    Dengue hemorrhagic fever (DHF), a potentially lethal complication, was first recognized in the 1950s during dengue epidemics in the Philippines and Thailand. Today DHF affects most Asian countries and has become a leading cause of hospitalization and death among children in the region.
   There are four distinct, but closely related, viruses that cause dengue. Recovery from infection by one provides lifelong immunity against that virus but confers only partial and transient protection against subsequent infection by the other three viruses. There is good evidence that sequential infection increases the risk of developing DHF.

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