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Category: Aedes and Dengue

Control and Prevention

Control and Prevention

Tips on how to prevent dengue fever

  • use insect repellent
  • wear loose but protective clothing – mosquitoes can bite through tight-fitting clothes; trousers, long-sleeved shirts, and socks and shoes (not sandals) are ideal
  • sleep under a mosquito net – ideally one that has been treated with insecticide
  • be aware of your environment – preventing mosquitoes from accessing egg-laying habitats by environmental management and modification
  • eliminate the vector by

– changing water and scrubbing sides of lower vases once a


– keep water containers covered.

– proper disposal of rubber tires, empty bottles and cans.

  • Avoid too many hanging clothes inside the house.



In late 2015, the first dengue vaccine, Dengvaxia (CYD-TDV) by Sanofi Pasteur, was registered in several countries for use in individuals 9-45 years of age living in endemic areas.




There is no specific treatment for dengue fever. Because dengue is caused by a virus, there is no specific medicine or antibiotic to treat it, the only treatment is to treat the symptoms. For typical dengue, the treatment is purely concerned with relief of the symptoms (symptomatic). Rest and fluid intake for adequate hydration is important

For severe dengue, medical care by physicians and nurses experienced with the effects and progression of the disease can save lives – decreasing mortality rates from more than 20% to less than 1%. Maintenance of the patient’s body fluid volume is critical to severe dengue care.


Life Cycle of Aedes

Life Cycle of Aedes

life cycle

Life Stages of Aedes Mosquitoes

•• Adult, female mosquitoes lay their eggs on the inner, wet walls of containers with water, above the waterline.
•• Eggs are very hardy; they stick to the walls of a container
like glue and can survive drying out for up to 8 months

•• Larvae emerge from mosquito eggs, but only after the
water level rises to cover the eggs. This means that
rainwater or humans adding water to containers with eggs
will trigger the larvae to emerge.
•• Larvae feed on microorganisms in the water. After molting
three times, the larva becomes a pupa.

•• Pupae will develop until the body of the newly formed
adult flying mosquito emerges from the pupal skin and
leaves the water.

•• After adult mosquitoes emerge: male mosquitoes feed
on nectar from flowers and female mosquitoes feed on
humans and animals for blood to produce eggs.
•• After feeding, female mosquitoes will look for water
sources to lay more eggs.
•• Aedes aegypti only flies a few blocks during its life.
•• Unlike other mosquito species, Aedes aegypti mosquitoes
prefer to bite people.
•• Aedes aegypti mosquitoes prefer to live near people. They
can be found inside homes, buildings, and businesses
where window and door screens are not used or doors are
left propped open.