Transfer of Dengue Virus
Aedes mosquito becomes infected by feeding on a patient with dengue infection usually from the day before onset of dengue fever to the fifth day of illness.
After an incubation period of about 8-10 days, the mosquito remains infective for life. The female mosquitoes pass on the virus to their offspring through the eggs. The ‘mosquito bites’ transfer the virus to man in whom it circulates for almost a week. The infected human has high fever during this period.