INTRODUCTION ( 2019-08-28)
Dengue is a mosquito- borne viral infection disease that causes flu- like illness and occasionally develops into a potentially lethal complication called severe dengue. There are 4 distinct serotypes of dengue virus of Flaviviridea family that are Den-1, Den-2, Den-3 and Den-4. It is generally found in tropical and sub- tropical climates worldwide, mostly in unplanned urban and sub- urban areas. It is mostly transmitted by female mosquitoes mainly of the species Aedes Aegypti and also Aedes Albopictus, secondary dengue vector in Asia. These species of mosquitoes are also responsible for transmitting Chikungunya, yellow fever and Zika infection. Aedes Aegypti is a day – time feeder and its peak biting periods are early in the morning and in the evening before dusk. Its eggs can remain dry for over a year in their breeding habitat and become active again when in contact with water.