General Practice 2022

How to identify the dengue mosquito (Aedes aegypti)

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How to identify the dengue mosquito (Aedes aegypti)
How to identify the dengue mosquito (Aedes aegypti)

Aedes aegypti is the mosquito responsible for Dengue, Zika and Chikungunya and is very similar to the mosquito, however it has some characteristics that help to differentiate it from other mosquitoes. In addition to its black and white stripes, the mosquito has some habits that help to identify it.

The dengue mosquito, besides being silent:

  • It stings during the day, especially in the early morning or late afternoon;
  • It bites, mainly, in the legs, ankles or feet and its bite usually does not hurt or itch;
  • Has low flight, with a maximum distance of 1 meter from the ground.

In addition, Aedes aegypti is more common in the summer, and it is recommended to use repellents, use insecticide in the house or put mosquito nets on doors and windows. A natural way to keep mosquitoes away is to light citronella candles indoors.

The mosquito that transmits Dengue, Zika and Chikungunya is also the main responsible for the transmission of yellow fever, so it is important to fight it, avoiding the accumulation of stagnant water in containers such as cups, tires, bottle caps bottle or potted plants. Learn more about dengue transmission.

Photos of the dengue mosquito

Characteristics of the Aedes aegypti mosquito

The mosquito has the following characteristics:

  • Size: between 0, 5 and 1 cm
  • Color: it has black color and white stripes on the paws, head and body;
  • Wings: has 2 pairs of translucent wings;
  • Paws: has 3 pairs of legs.

This mosquito does not like heat and, therefore, during the hottest hours of the day, it is hidden in the shade or indoors. Although it usually bites during the day, this mosquito can also bite at night.

Aedes aegypti life cycle

Aedes aegypti takes an average of 3-10 days to develop and lives approximately 1 month. The female mosquito can medically produce 3000 eggs in her entire reproductive cycle. The life cycle of Aedes aegypti begins in standing water where it passes from egg to larva to pupa. It then transforms into a mosquito and becomes terrestrial, ready to reproduce. The main characteristics of each phase are:

  • Egg: It can remain inactive for up to 8 months glued above the waterline, even in a dry place and in intense cold, until it finds the ideal conditions to turn into a larva, which are heat and standing water;
  • Larva: It lives in the water, feeds on protozoa, bacteria and fungi present in the water and in just 5 days it pupae;
  • Pupa: Lives in water where it continues to develop, and becomes an adult mosquito in 2-3 days;
  • Adult mosquito: is ready to fly and reproduce, but for that it needs to feed on human or animal blood, at which point the transmission of diseases occurs.

Learn more details about each phase of the Aedes aegypti life cycle.

Larvae and pupae of Aedes Aegypti

Aedes Aegypti larvae and pupae

How to fight Aedes aegypti

To combat the dengue mosquito, it is important to avoid the existence of places or objects, such as lids, tires, vases or bottles, that can accumulate stagnant water, facilitating the development of the mosquito. So it is advised:

  • Keep the water tank closed with the lid;
  • Clean the gutters, removing leaves, twigs and other objects that may impede the passage of water;
  • Do not allow rainwater to accumulate on the slab;
  • Wash tanks used to store water with a brush and soap weekly;
  • Keep water vats and barrels well capped;
  • Fill the vases with sand;
  • Wash vases with aquatic plants once a week, using a brush and soap;
  • Save empty bottles upside down;
  • Deliver old tires to the urban cleaning service or store them without water and sheltered from the rain;
  • Put the garbage in closed bags and close the garbage can.

Another way to prevent the development of the dengue mosquito is to put a natural larvicide in all plant dishes, mixing 2 tablespoons of coffee grounds in 250 ml of water and add to the plant dish, repeating this procedure every week.Check out these and other tips by watching the video below:

Anvisa has already approved the use of a biological larvicide, called Biovech, which is capable of killing dengue lava and mosquitoes in just 24 hours, without leaving toxic residues that could harm the environment and that is why it is safe for man, animals and plants.

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