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DENGUE VIRUS & Its SPREAD BY MOSQUITOES:

DENGUE VIRUS & Its SPREAD BY MOSQUITOES:
Dengue fever is a viral infection caused by dengue virus which has four serotypes said to be serotype 1, 2, 3 and 4. In Pakistan the most common serotypes involved are 2 and 3.
The vector of dengue fever is aedes aegypti mosquito but in Pakistan it has been seen that in 50 percent of the cases aedes albopticus mosquito is also involved. Only the female mosquitoes of these before mentioned types are responsible for spread of dengue virus as they lay eggs and need proteins for that purpose and they get that protein from the blood of human beings. Male mosquitoes don’t bite and so are not involved in the spread.
These mosquitoes have a life cycle of total of 2 weeks out of which first week is for the maturation of mosquito and the second week is for reproductive cycle in which these female mosquitoes lay eggs. Every mosquito can lay around 600 eggs in its life , 300 being at a time. These eggs can stay at any place for about 9 months till the weather becomes favorable upon which eggs hatch. Breeding places of these mosquitoes are mostly damp places and clean water outdoor. Parks, pools, lakes, green places which are watered every day being at the top of the list. But the mosquito itself likes to live indoor and usually is seen under the sofa or beds etc and so it mostly bits on ankles and feet. A research has shown that its sting has some local anesthetic effect due to which when the mosquito bites person usually does not feel any pain. The mosquito has white stripes on its body and is very fast and quick. So its like a commando equipped with best ammo ever and with all the abilities of hiding and being very quick. So it’s a bit difficult to smash it if you try to. When the mosquito bites a person with dengue virus in its blood the virus gets transferred to the mosquito. It multiplies in the mosquito and it takes around 2 days to reach tissues of the mosquito and ultimately its salivary glands so that the mosquito might be able to transfer it further to others. So it means that if any aedes aegypti bites a dengue patient and bites you immediately you may not get dengue fever. Furthermore when these mosquitoes with viruses bite human, symptoms develop after around 2 days. So if you develop symptoms of dengue then it does not mean that a mosquito just bit you. Keep it clear that these are due to some mosquito which bit you about 2 days ago. And as its painless sting so you can never be sure when that happened.

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