Causes of Dengue The prime cause is the bite of a mosquito that flourishes during rainy season and breed in the water filled potholes and puddles.
5. How Mosquitoes Spread the Infection • Disease starts during the rainy season, when vector mosquito Aedes aegypti is abundant. • The Aedes breeds in the tropical or semitropical climates in water holding receptacles or in plants close to human dwellings. • A female Aedes acquires the infection feeding upon a viremic human. • After a period of 8-14 days mosquitoes are infective and remain infective for life (1-3) months.