Why are there mosquitoes everywhere?
This is your misunderstanding. In fact, the place where mosquitoes fly is uncertain. It is only the ears that you can clearly perceive. On the antennae of the mosquitoes, there is a feeling of hair. Under the electron microscope, it can be clearly seen that each of the felt hairs is densely arranged with circular or elliptical pores. The carbon dioxide molecules emitted by the human body in the air reach the mosquito brain through the pores of the mosquitoes, and react within a thousandth of a second to the body of the carbon dioxide molecule – the human body. Experiments have shown that mosquitoes can detect carbon dioxide gas 15 meters away from the human body.
American scientists have done the following experiments: He puts a person in a tight-fitting rubber coat in a small laboratory with a large group of mosquitoes inside. When the carbon dioxide exhaled by the person is led to the outside by the pipe, the mosquito ignores the person; if a little carbon dioxide is released indoors, the mosquito will rush to fly bite. It can be seen that mosquitoes find people by carbon dioxide gas, not by body temperature.
Mosquito bites don’t bite you about what you eat
We know that the place with the highest concentration of carbon dioxide gas around the human body should be near the nostrils and mouth. However, the part where people are bitten by mosquitoes is not the face, but the place where they are away from the mouth and nose.
Therefore, some scientists believe that mosquitoes do not rely on carbon dioxide to find people but rely on the taste of lactic acid to find people. They found that the antennae of the mosquito had a thicker short hair with lactic acid receptors. Other mammals, including humans, secrete a volatile metabolite, lactic acid. This lactic acid can be excreted from the body through each pore and volatilized in vitro. After the mosquito is detected, the human body is found following the lactic acid taste. This explains why some people are often bitten by mosquitoes: different people have different levels of lactic acid secretion. Also, mosquitoes generally prefer the latter compared to those who do not bathe often. Moreover, people who regularly smoke, drink, and eat garlic can also smother mosquito bites because their metabolites contain other strong irritating substances in addition to lactic acid, which masks the taste of lactic acid. If children compare with adults, children are more likely to be bitten by mosquitoes. That is because children love sweets. The metabolites of sweets that are digested and decomposed in the body are lactic acid. Therefore, the high lactic acid content in sweat is more likely to attract mosquitoes.
Some scientists have found that people who love to eat green vegetables are easy to attract the bites of mosquitoes. Later, it was only clear that people who eat more vegetables have a chemical called octanol, and mosquito receptors are very sensitive to this substance. Mosquitoes find cattle based on this substance, because cattle eat grass, and metabolites contain more octanol.
Taking vitamin B1 can prevent mosquito bites
American scientists have shown that taking vitamin B1 can prevent mosquito bites. Scientists allowed 60% of vitamin B1 to be taken daily by field workers. After 3 days, the subjects were not bitten by mosquitoes for 6 consecutive nights. This is mainly because vitamin B1 decomposes in the human body and produces a volatile chemical substance that blocks the sensation of hair on the antennae of the mosquito, making the mosquito unable to find a person.
Mosquitoes rely on “foot odor” to find people
A recent study by the entomologist Knorr-Holstein of the Heinen Agricultural University in the Netherlands found that mosquitoes do not rely on carbon dioxide, nor rely on lactic acid to find people, but rely on “foot odor” to find people. He filled the mosquito nets with mosquitoes and personally drilled into the experiment. He was surprised to find that the mosquito was mainly biting his foot. He washed his feet with medicated soap to remove the stench of his feet, and the hungry mosquitoes began to attack his limbs. In order to prove that mosquitoes love foot odor, he and other researchers used a locally produced cheese that tastes like a stinky smell. This trick is very effective, and mosquitoes are rushing.
Further research has shown that the fatty acids contained in this stinky cheese odor are very similar to those in human foot odor. This is because the bacteria that produce the smell of cheese are close relatives to the bacteria that produce foot odor, so the metabolites of the two bacteria are similar.
Knors said that the reason for studying mosquitoes and monks is to exempt people from harm (mosquitoes can spread diseases). Therefore, the next step is to synthesize “foot odor” to attract mosquitoes and feed them to avoid human suffering.