Dengue fever paragraph in 200 words
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Dengue fever is a mosquito-borne tropical disease caused by the dengue virus.Symptoms typically begin three to fourteen days after infection.This may include a high fever,hedache,vomiting,muscle and joint pains,and a characteristic skin rash.Recovery generally takes two to seven days.In a small proportion of cases, the disease develops into severe dengue, also known as dengue hemorrhagic fever, resulting in bleeding,low level of blood platelets and blood plasma leakage, or into dengue shock syndrome, where dangerously low blood presure occurs.
Dengue is spread by several species of female mosquitoes of the aedes type principally A. aegypti.The virus has five types; infection with one type usually gives lifelong immunity to that type, but only short-term immunity to the others. Subsequent infection with a different type increases the risk of severe complications.A number of tests are available to confirm the diagnosis including detecting antibodies to the virus or its RNA.
Dengue has become a global problem since the Second World War and is common in more than 110 countries, mainly in Asia and South America.Each year between 50 and 528 million people are infected and approximately 10,000 to 20,000 die.Its viral cause and spread were understood by the early 20th century. Apart from eliminating the mosquitos, work is ongoing for medication targeted directly at the virus.It is classified as a neglected tropical disease.
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