What are the causes of dengue fever?

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Four types of dengue virus can cause dengue fever. These dengue viruses are spread by mosquito Aedes aegypti and rarely spread by Aedes albopictus mosquito. Aedes aegypti mosquito sprang up in Africa. Now this mosquito is found in tropical areas of the world especially in areas which are densely populated.

Aedes aegypti mosquito is transmitted to human from an infected mosquito. This process usually begins when a person infected with dengue fever virus is bitten by Aedes aegypti mosquito. The dengue virus then spreads when an infected mosquito bites a healthy person. If someone is suffered from a dengue fever previously then it is possible for that person to be infected with dengue virus again since dengue fever is caused by many different types of dengue virus. In this case, there is a chance to develop a severe form of dengue fever i.e. dengue hemorrhagic fever in all those persons who are already infected with dengue virus.

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Filed Under: DiseasesInsect bites and Stings

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