Why Mosquitoes bite us?

Definitely, mosquitoes are annoying and they can spread diseases also. Since each mosquito lays thousands of eggs, destroying a mosquito equals destroying thousands of mosquitoes. Mosquitoes have chemo sensors which enable them to detect the humans or any other animal by the odor, heat etc released by the body and also the carbon dioxide exhaled by the humans and the other animals. Mosquito bites are caused only by the bite of a female mosquito. The female mosquito feeds off our blood by piercing the skin with the proboscis, a modified mouth part. While sucking our blood, mosquito deposits some saliva into the skin. The saliva contains anticoagulant proteins that remain in our body and react with the body chemicals, resulting in the characteristic itching and bump. Both Male and Female Mosquito are Plant juice feeders but female mosquito bites human beings to get blood protein for the maturation of their eggs. On the first day of emerging from the pupa, female mosquito do not bite and on the second day, it mates and starts feeding human blood. After two or three days it lays thousands of eggs in water and die off.

Mosquitoes are Crepuscular (Twilight active- Evening and early morning) and they show mass migration (swarming) in places where human beings are located. Mosquito has feeble flying ability so that they can fly only 10-20 meters distance and up to a height of 20-25 meters. They usually fly above the ground level around 2-3 feet. That is why we get more mosquito bites in the legs. Mosquitoes prefer legs since they get sufficient blood from the legs, because the veins in the legs are large and are located just below the skin. The mosquitoes biting us are the members of the local population .That is, the mosquitoes reared in our own home. Mosquitoes from long distance will not migrate to our home for biting.

Ultrasound detection

Male mosquito produces characteristic ultrasound vibrations to attract females. After mating, female mosquito avoids the presence of males by detecting the ultrasound from males. This is the principle in Ultrasound mosquito repellents that produces 22-38 kHz ultrasound to simulates the sound of male mosquito. The female mosquito considers the device as a male mosquito and avoids its presence.

Human detection

Mosquitoes have complex methods for detecting the hosts and different types of mosquitoes react to different stimuli. Most mosquitoes are active at dawn and dusk, but there are also day biting mosquitoes. There are many factors that attract mosquitoes towards you.

1. Body Temperature

The exact body temperature sensing depends on the type of mosquito. Many mosquitoes are attracted to the slightly cooler temperatures of the extremities (hands, foot, nose, and ear) of the body.

2. Carbon Dioxide

Carbon dioxide content in the body attracts mosquitoes. Carbon dioxide content in the closed room also attracts mosquitoes.

3. Moisture

Mosquitoes are attracted by perspiration because of the chemicals it contains and also because it increases the humidity around your body. Interior plants, aquarium etc attracts more mosquitoes.

4. Lactic Acid

Lactic acid content of the body is another attractant. Lactic acid content in the blood increases after exercise and also after eating salty and high potassium food materials.

5. Perfumes and Flowers

Perfumes, floral decorations, cosmetics, fragrant cloths etc attract mosquitoes.

6. Dark Clothing

Dark cloths attract mosquitoes because they can easily locate the host from the surroundings. They have feeble vision. Mosquitoes rests on the removed clothes due to the presence of body smell believing that human is there.


One thought on “Why Mosquitoes bite us?

  1. Abdullatheef 14 Jan 2013 / 9:32 pm

    From where I can get ultrasonic mosquit repeller or its circuite

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