Dengue is caused by Arboviruses that is transmitted through infected mosquitoes-Aedes aegypti and Aedes albopictus. The Aedes aegypti mosquito (Figure 1) breeds mostly in the urban environment and man-made habitat containers1.

Aedes albopictus is found mostly in Asia and transmits infection in North America and Europe, largely as a result of the international trade in used tyres and other goods. Ae. albopictus is highly adaptive it is able to survive and spread infection due to its ability to shelter in microhabitats and tolerate very low temperatures.

The infection from mosquitoes will cause a wide spectrum of clinical illness, from non-specific viral syndrome to severe haemorrhagic disease. The mosquitoes acquire the virus by feeding on the blood of an individual infected with dengue virus. The infected mosquito then transmits the virus to other individuals for the rest of its life. The dengue virus circulates in the blood of the infected human for 3-14 days. After which, the symptoms of infection will begin to show at 4-7 days and can last for up to 10 days. The virus burden is the greatest in the first five days after the individual has been infected. During this time, the individual may be bitten by a mosquito and the virus begins to incubate for 8-12 days within the mosquito and becomes infectious, capable of infecting another individual.

Figure 1. Aedes aegypti