Take you to understand the mosquito driven

Source: Science Popularization China

High temperature and humidity in summer are the most harmful seasons such as sucking insects such as mosquitoes. A large number of mosquito activities not only increase the risk of spreading malaria, dengue fever, and epidemic encephalitis, but also seriously affect people's normal work and life.

So how do mosquitoes track us? Why is it red and swollen after being bitten by a mosquito? There are many mosquito repellent products in the market, which is dazzling. What are their effective ingredients? Are there any adverse reactions to the human body? What are the precautions in use?

How does mosquito track us

Existing research believes that mosquito is attracted by the body's heat, exhaled carbon dioxide, and the smell (mainly includes lactic acid, 1ˉ 辛 ˉ 3ˉ) and searched for the host.

Among the many seductive and stimulating factors of mosquitoes, the sense of smell is considered the most important. Therefore, almost all mosquito drives are to achieve the behavior of driving away mosquitoes by affecting the olfactory perception mechanism of mosquito. The smell of mosquito receiving the human body is mainly through a specific olfactory receptor and a co -receptor. The major mechanism of the most driven agent is similar to the current that the olfactory receptor of the mosquito is inhibited. There are also some mechanisms of some driving agents. It is not achieved by affecting the receptor. For example, the aversion of mihamines can play the role of "mask", which can reduce the smell of mosquito on the human skin, so that mosquito is not easy to search for mosquitoes. To the host.

Why do you wrap it after being bitten by a mosquito?

The bite of the red and swollen hair and itchy mosquito should actually be said to be "stabbed" by female mosquitoes, because the male mosquito does not suck blood, and only sucks plant juice. In order to better blood sucking, mosquitoes will inject anticoagulants, methic acid, digestive enzymes, and a variety of unknown proteins into the human body. The anticoagulant can prevent blood condensation and blood vessel shrinkage. The painful portion, so that it can be stable and stable, but people do not know. When the mosquito is full and drinks and leaves, it leaves a itchy swollen bag. These swollen bags are a normal allergic reaction of the human body.

Mosquitoes injected saliva containing complex ingredients into the human body, and the human immune system was mobilized by these foreign substances, and tried to remove these foreign substances and had an immune response. In the process, a material called histamine will be released, which can expand the capillaries and increase the transparency of the blood vessels, make the cells full of liquid, and inflammation. Itching and redness. When the skin is bitten by a mosquito, you can immediately pinch the bite tightly with your hands to prevent the irritating ingredients such as methic acid in mosquito saliva expand the erosion surface, and you can use dehydrated cotton dipped ammonia water to rub the bite. Because ammonia water is weakly alkaline, when immersed in the skin, it reacts with methic acid in the mosquito saliva, which generates ammonium non -irritating ingredients to the skin, which can relieve itching.

It should be noted that thick ammonia water has corrosion effect on the skin, so it must be diluted before using it. According to this truth, weak alkaline solutions such as soda (sodium bicarbonate) solution and soapy water can also be used to relieve itching.

What are the commonly used mosquito repellent products

1. Products containing meritoride

Miramine, slightly poisonous, tasteless, has a repellent effect on a variety of insects such as mosquito, 蠓, and 蚋, and is an high -efficiency and broad -spectrum driving agent. In 1946, it was first used in the U.S. army and was commodized in 1965. Its products containing such substances have been widely used for more than half a century.

Common mosquito repellent products containing mosquitoes in my country include flower dew, mosquito repellent, mosquito repellent cream, etc. In the mosquito repellent flower dew water, the content range of the mosquitoistide is generally 2.0%to 7.5%, and most of the content is 4.0%to 5.0%; the content range of mosquito repellent in the mosquito repellent fluid is 4.0%to 15.0%, and the content is 10.0%. More. Commonly used are Shi Mei Mosquito Dewy Water, Mosquito Mosquito Ding Mosquito Dewy Water, Longli Mosquito Reading Mosquito Flower Dew Water, Eller Chrysanthemum Reading Water, Chunjuan Mosquito Dewy Water, Baozhongbao Mosquito Mosquito Dedication Water and so on.

2. Products containing mosquito esters

Mosquito repellent is also an excellent broad -spectrum mosquito repellent, which has a good avoidance effect on insects such as mosquito, crickets, beef, and white ravioli.

The products containing mosquito esters include mosquito repellent flower dew water, mosquito repellent liquid, etc. The content of mosquito dew water in the dew water repellent in the dew water is generally 1.8%to 5.0%, and most of the content is 4.0%to 5.0%; Generally 2.5%to 11.5%. Common ones are six gods, mosquito repellent flower dew water, six gods, mosquito repellent flower dew water, narcissus brand mosquito repellent spray, Johnson ostellets of mosquito dew water, baby gold, gold and silver flower mosquito liquid, encounter Xiangfen mosquito repellent flower dew water and so on.

3. Botanical mosquito -driving products

The history of human use of plants such as plants can be traced back to ancient times. In the 11th century, my country began to use hemp, duckweed, Jingye, and Ai leaves to drive mosquitoes. Bite method. Ancient Russian herdsmen used smoke to repel mosquito driven mosquitoes. Since the 17th century, many natural plant essential oils with mosquito repellent have gradually been discovered and used, such as musk oil, coconut oil, lemon oil, eucalyptus oil, grass oil, butning oil, etc. At the beginning of the 20th century, lemongrass oil was the most common driving agent in Western countries.

Common commercially available botanical mosquito repellent products are mainly mosquito repellent flower dew water. Mint extract), dragon and tiger geranium dew water (the main ingredients are mint alcohol, yellow cricket bark extract, beef, blue eucalyptus leaf oil, cinnamon leaf oil, clove leaf oil, fragrant leaf girin oil) (The main ingredients are calamus extracts, mint extracts), baby gold and aquatic raw liquid (the main ingredient is wild chrysanthemum extract, forbearing winter flower extract, mint extracts), and Tian Ge avoids mosquito and antipyretic flower dew water (the main ingredient is the main ingredients is that the main ingredients are as the main ingredients. Ai leaf extract, lemongrass extract, lavender extract, mint leaf oil) and so on. Is there any adverse reaction to the human body?

The management of mosquito repellent dew water belongs to the category of pesticide management. The registration of mosquito repellent products containing mosquitoramine and mosquito esters is the same as that of commonly used hygienic pesticides. The label of qualified products should have the word "pesticide", and there are three certificates for pesticide registration (pesticide production license or pesticide production Approval documents, pesticide standards and pesticide registration certificates) numbers, otherwise it is an illegal product. It is recommended that the public pay more attention when buying and using it.

Miramine: After using a product containing Miramine, sensitive people can produce contact dermatitis. The main symptoms are itching and vascular edema. In addition, the athletes have a stimulating effect on the eyes, and some people may also have conjunctivitis.

Anti -avoidance on the skin of adults will enter the blood by 9%to 56%after 6 hours. Once they are eaten by mistake, the concentration in the blood can reach hundreds of times external and produce a series of serious adverse reactions. Due to the greater toxicity of the oral avoidance, countries have strict regulations on the use of such products in children. Children's health institutions in Canada stipulate that infants who are under June cannot use mixture -free products. Children from June to 2 years old can be used once a day. Children aged 2 to 12 can use it 3 times a day. The concentration of avoidance of mihin cannot exceed 10.0%. The US Food and Drug Administration stipulates that babies who are under the age of February shall not use the sheltering products.

Mosquito repellent: Compared with mosquitoramine, the mosquito repellent has the characteristics of lower toxicity, less irritating, longer avoidance time, and more stable chemical properties. It has been used in Europe for more than 20 years with mosquito -absorbers as a mosquito repellent, and no obvious toxic reaction has been found.

Plant source drive -free: At present, there are fewer research on the toxicity of plant source drives and their health risks. For example, in Canada, lemongrass oil and lavender oil coating agents are often used for mosquito prevention, but because of lack of evidence of their safety, it is not recommended for children under 2 years of age. In the future, it should be further explored and evaluated its safety risks to determine the impact of such products on human health, especially the impact of the health of infants and young children.

What should I pay attention to when using mosquito drives

1. Use before you may be bitten to avoid being used for wounds

The ingredients of mosquito dew water are ethanol, repellent and flavors. After being bitten by a mosquito, a wound will be left on the skin. If you use flower dew water at this time, chemicals and other chemicals such as ethanol and evasites in flower dew water will directly stimulate the skin through wounds and enter the human body. Not only can it not reduce inflammation, and sometimes it will increase skin damage.

2. Do not use it after dermatitis

Applying mosquito repellent dew water after dermatitis can not only treat dermatitis, but also mosquito repellent, mosquitoistamine, etc. can also cause skin allergic reactions and increase the symptoms of dermatitis. Patients with dermatitis can drop 4 to 5 drops of mosquito repellent flower on the electric mosquito fragrance tablets, which can not only repel mosquitoes and avoid skin allergies.

3. Far away from Minghuo, store in a cool and ventilated place

Flower dew water contains 75%of ethanol and 5%flavors, which will be ignited once close to the fire source. Therefore, do not immediately use fire or near the fire source after using flower dew water, such as mosquito coils, cigarettes, and use of light fire stoves.

4. Avoid children eating mistakes

Put where children can't get in touch to prevent children from being harmed after eating by mistake; do not use it on the hands of infants and young children, so as not to enter the body when sucking their fingers.

5. Wash the residual mosquito repellent products in time

Experts from the U.S. Department of Environmental Protection and American Pediatric Association suggested that they should return to the room from outdoor or mosquito places with many places with many mosquitoes, or when there is no bite risk of mosquitoes, they should be cleaned in time to clean the skin or remaining mosquito repellent products on the clothes.

- END -