Health Ministry-Sri Lanka

தடுப்பதற்கான முறைகள்

Integrated vector management

Prevention and control of dengue virus transmission depends entirely on control of the mosquito vectors or interruption of human – vector contact. 

Environmental Management

Environmental management is a key element of IVM. Environmental management can include environmental modification, environmental manipulation, and strategies that reduce contacts between vectors and humans.

In the case of mosquitoes, the larvae are easier to control than adults because they are confined to water bodies. Therefore, removing whatever practicable,  water collection called “source reduction” should be a primary consideration in mosquito control.

Environmental manipulation 

Strategies involve recurrent activities such as measures that have a temporary effect on vector habitat and need to be repeated Eg. Covering of water storage containers or tanks with tight lids, screens or net covers

Removal of water with scrubbing and cleaning of the inner surfaces of water storage containers, refrigerator trays, ant traps, tanks or flower vases to remove mosquito eggs.


•    Changing water salinity and PH in ant traps, refrigerator trays etc. By adding salt or soap
•    Puncturing blocked flower pots to produce a drain hole
•    Keeping machinery parts and scrap material of factories in a sheltered place to prevent the collection of rain water. Proper tire management, storing unused tires under a shelter in bus depots and other places

Environmental modifications
 Usually involves capital-intensive investments in permanent infrastructures,

1.    new buildings without roof gutters  
2.    Proper discarded receptacles (burying, crushing, burning)
3.    Mosquito proofing of overhead tanks rainwater harvesting tanks, underground storage tanks, domestic wells
4.    Proper drainage of cement lined or concrete drains
5.    Permanent removal of Roof gutters, and construction of new buildings without roof gutters  
6.    Proper discarded receptacles (burying, crushing, burning)

Permanent removal of Roof gutters, introduced as a policy in the code of practice.

Removal of unnecessary water collecting plants like Bromelia

Reduce Human – vector contacts

A third type of environmental management strategy aims to reduce human–vector contacts through the strategic placement of settlements and housing, or better use of window screening. Originally, such included effective use of mosquito nets, wearing protective clothing      

Enforcement of law against offenders 

Enforcement of law against the offenders who are keeping dengue mosquito breeding places in his/her premises which will endanger the lives of others



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