How does Malaria and Dengue spreads?

Answer 1

Dengue the most prevalent arthropod-borne viral (Arborvirus) disease of humans caused by  four serotypes of dengue virus (DENV 1-4) of the genus Flavivirus.
It is transmitted to man by mosquito Aedes aegypti. It is common in tropical and subtropical countries, especially in coastal areas.
Source: Man is infective to mosquito and mosquito transmits the disease to man.

Human malaria is an acute and chronic protozoal disease caused by any one or a combination of four species of plasmodia - Plasmodia, vivex, falciparum, ovale & malariae.  
P. falciparum cause malignant tertian malaria with high fatality rate. The other three species are 'benign' . Infections with P. ovale and P malariae are now rare.
All forms malaria are transmitted by female anopheles mosquito.

Answer 2

Malaria and Dengue spreads through Mosquito larvae
Mosquitoes breed in stagnant and still water and the sweepers here say there are dozens of water coolers on the campus which are not cleaned regularly - providing a prefect breeding ground for Aedes mosquitoes which carry the dengue virus.


Walking around the campus, one does see several coolers which do not look clean at all.



Murky drain

But the main abode of mosquitoes here is probably not these coolers.


This drain is a perfect breeding ground for mosquitoes


The smell hits you suddenly and the stench grows as you walk towards its source - a huge open drain just outside the boundary wall of the campus.


The dark grey murky water is thick with filth. Thousands of polythene bags float in its grime.

And thousands of mosquitoes are to be seen whirring over the filth.

The AIIMS boundary wall is just five metres from the drain. On the other side there are hundreds of houses.


Anil Kumar Sharma, president of the Resident Doctor's Association of AIIMS, says no one in the area is safe from dengue.


"We are humans and mosquitoes don't differentiate between doctors and others," he says.

Mr Sharma is clearly angry about hygiene at AIIMS.

"If you come here next year, then also you will find this drain. No one will ever cover it. We have informed the municipal authorities but no action has been taken yet.


"Whenever dengue or malaria spreads, people talk about this drain. But afterwards, no one talks about sanitation and cleanliness," he says.


Some patients at the hospital, too, say they are concerned about contracting the fever.

Balbir, who has come here to get his sister treated for heart disease, says: "You know there are so many cases in this hospital. I'm afraid I may catch dengue too."

Answer 3

When mosquitos bite humans (or any animal for that matter) they inject some saliva. Malaria lives in that saliva and is transmitted. HIV is not in mosquito saliva, it is not transmitted. Mosquitos do not transmit blood from one human to another. In theory, the only way mosquitoes could transmit HIV from human to human is if they bit an infected individual, acquired HIV on the outside of their stylet (sucking mouthparts), and then bit a healthy individual very shortly after that. But there are no recorded instances of this happening, and the way that mosquitoes feed it is not likely.

Answer 4

both are caused by mosquito bites
Malaria parasites are transmitted by female Anopheles mosquitoes.
Dengue is transmitted to humans by the mosquito Aedes aegypti

Answer 5

I think culex mosquitoes are the carriers of the virus.I'm sure,it could be aedes,or anopheles.Worse still they inject the virus into the larvae hence making all the coming generations ,carriers of dengue n malaria.

Answer 6

How Does Dengue Spread

Answer 7

direct spread-blood tranfusion
indirect- bite of female mosquito

Answer 8

both spread from mosqito bites

Answer 9

for info got to this site

http://www.medindia.net/articles/mosquito_diseases.asp