The weather is getting hotter and the mosquitoes are here. It seems that mosquitoes like to bite certain people. Do they smell good?

American scientists have found that carbon dioxide emitted by the human body, lactic acid in sweat, and the aromatic smells emitted by perfume, hair oil, and deodorant are all "favored" by mosquitoes. According to local media reports, U.S. Department of Agriculture chemical expert Ulric Bernier and others are conducting a study to understand which of the more than 1,000 chemical substances on the surface of human skin "attract" mosquitoes in order to develop effective mosquito killers. agent.

At a laboratory in Gainesville, Florida, Bernier found that carbon dioxide emitted by the human body, lactic acid in sweat, and aromatic odors such as perfume, hair oil, and deodorant all attract mosquitoes. And wearing black clothes also attracts mosquitoes. In addition, Bernier also found that there are some chemicals on the surface of human skin that mosquitoes hate, but Bernier did not elaborate on what substances they were. Since everyone's body odor is different, mosquito bites vary from person to person. In addition, mosquitoes themselves also have their own "likes and dislikes." This is currently being studied by Bernier et al.

Some people think that eating beer yeast, garlic or vitamin B12 can prevent mosquito bites, but researchers say these unsophisticated methods are actually of little use. Bernier pointed out that specific research is needed on what to eat to avoid mosquito bites. Keeping your living environment clean and tidy to prevent mosquitoes from breeding is the key to preventing mosquito bites.

Male mosquitoes do not suck blood, but only suck plant juices, so they generally do not enter the house. Only when the weather gets cold after autumn will we run indoors to avoid the cold. All mosquitoes suck blood. They suck blood to increase nutrition and reproduce their offspring. When they are full, they look for a place with water to lay their eggs.

They usually start to go out in May and reach their peak activity in mid-to-late August. When the climate cools down in autumn and the temperature drops below 10 degrees Celsius, they will stop breeding and enter hibernation without food until they wake up in the following spring. Their favorite temperature is around 30 degrees Celsius, and they can't stand it if it's too high. Their living and breeding environment must have water, so ground water, smelly ditches, sewers, cans and mineral water bottles thrown away by people are their ideal homes.

Scientist research shows that mosquitoes are selective in biting people, and people who can bring rich cholesterol and vitamin B to mosquitoes are most favored by mosquitoes. Mosquitoes use smell to find the most suitable objects in the crowd. Cholesterol and B vitamins are two substances that pesky insects like mosquitoes need to survive but cannot produce on their own.

Mosquitoes have a strong sense of smell. When humans exhale carbon dioxide and other odors, these odors diffuse in the air, and these odors are like dinner bells, telling mosquitoes that a delicious meal is just around the corner. When a mosquito tracks its target, it always follows the smell of human exhalation and zigzags until it contacts the target. Then it falls on the skin and patiently searches for a "breakthrough". Finally, it inserts the "syringe" directly into the skin to suck blood for 8-10 seconds. bell.

Most cosmetics contain stearic acid (a type of fatty acid), so people who wear makeup are more "popular" with mosquitoes than those who don't. As for a person's cholesterol level, it does not affect a mosquito's judgment unless there is enough cholesterol stored close to the epidermis. Of course, there are some smells that mosquitoes hate, such as bay leaves, lemongrass oil, lemongrass, garlic and geraniol.

Another study showed that pregnant women are twice as likely to be bitten by mosquitoes as non-pregnant women. Researchers believe that the breath exhaled by women during pregnancy contains a variety of different chemicals, making them targets for malarial mosquito bites. In addition, pregnant women have a higher body temperature and sweat more, which is a good base for the growth of skin bacteria. These two reasons make pregnant women more susceptible to mosquitoes than other women.

Among them, the popularity index of "blood type theory" is quite high. When interviewing Professor Xu Hanhong, director of the Insect Toxicology Laboratory of South China Agricultural University, on this issue, the reporter with type A blood was besieged by experimental mosquitoes raised in the laboratory and harvested eight or nine big "red envelopes" within an hour, while the reporter with type O blood on the side Professor Xu, who was bleeding, was unscathed. This seems to confirm the conclusions of the "blood type theory" and "gender theory".

However, Professor Xu pointed out that the type of person a mosquito likes to bite is not directly related to blood type, gender, or sex appeal, but mainly depends on the body's ability to send "signals" to mosquitoes. A strong "signal" "By spreading through the air, it can be guided to find food easily.

You are more likely to get bitten if you wear dark twill jeans

For mosquitoes, the carbon dioxide and sweat emitted by the human body are effective messages to guide them to find prey. It mainly relies on its olfactory organ, a pair of horns on its head, to sense human body "messages" in the air and follow them to find its target. Don't underestimate the mosquito, which is only one centimeter long. It has a very strong search ability and can search up to 60 kilometers away. Within this range, targets with stronger "signals" are naturally more likely to be locked by them.

People who emit a lot of carbon dioxide have a relatively high concentration of carbon dioxide around them, so the "image" presented in the mosquito's field of vision is clearer, making it easier for mosquitoes to conduct directional tracking. Therefore, in a group, people with large lung capacity, fat people, and people with heavy breathing are more likely to be bitten by mosquitoes. Pregnant women exhale higher carbon dioxide due to their active metabolism.

The sweat emitted by the human body volatilizes in the air and can also send a "signal" to mosquitoes.

Usually, people who sweat a lot and are prone to sweating have a greater chance of being attacked by mosquitoes. This is enough to explain why we often find a few big "red envelopes" on our bodies after exercising. Mosquitoes like to bite people with rough skin and enlarged pores, usually because such people tend to have developed sweat glands or produce more sweat and other secretions. Therefore, men are sometimes more attracted to mosquitoes than women, and young people are more attracted to mosquitoes than the elderly.

Some people have found that women are particularly attracted to mosquitoes during menstruation or pregnancy. They think this may be related to high levels of sex hormone secretion, and concluded that "mosquitoes like to bite sexy people." Professor Xu pointed out that this is actually because women's endocrine changes in the above-mentioned stages, metabolism speeds up, sweating is often greater, and mosquitoes are more stimulated and guided. For the same reason, adolescents in the developmental stage are also prone to "attracting" mosquitoes.

One data shows that before giving birth, the exhalation volume of pregnant women is 21% greater than that of non-pregnant women. The moist gas and carbon dioxide exhaled are quite attractive to mosquitoes. In addition, the abdominal temperature of pregnant women is 0.7 times higher than that of non-pregnant women, and the higher the body temperature, the more volatile substances are on the skin surface.

Improper clothing will attract mosquitoes. It turns out that mosquitoes are afraid of light but don't like too dark light. They like to suck blood in low-light environments. During the day, when people wear dark clothes, the reflected light is darker, which is just what they want. In addition, mosquitoes like to bite people with higher body temperatures, and dark-colored clothes have a strong ability to absorb heat. The combination of several factors naturally makes the mosquito attraction index of dark clothes greatly increase. People often think that black clothes attract mosquitoes, but according to Professor Xu, wearing dark twill jeans is actually the most likely to be bitten by mosquitoes.

Perfume, hairspray, and face cream attract mosquitoes

If you dress up too much, you will get bitten by mosquitoes. Using flower-scented cosmetics such as perfume, hairspray, facial cream, and fire ointment will increase the chance of being bitten by mosquitoes. Some believe that most cosmetics contain chemicals that attract mosquitoes. Therefore, women who wear makeup are more "sought after" by mosquitoes than those who wear makeup. It is also not advisable to use soaps and shower gels with strong fragrances when taking a bath in summer.

However, not all scents will attract mosquitoes, such as citronella oil and eucalyptus oil, which are good mosquito repellents.

Mosquito repellent water should not be used with sunscreen

For people who are prone to mosquito bites, mosquito repellent water is a life-saving straw. But how can we maximize the effectiveness of mosquito repellent water? Professor Xu reminded that mosquito repellent should not be mixed with sunscreen and other perfumes. Because the main ingredients of mosquito repellent are DEET and alcohol, mixing them will reduce or even completely cancel the mosquito repellent effect.

Some women are afraid of being bitten by mosquitoes and being tanned by the scorching sun, so they simply apply mosquito repellent and sunscreen before going out every day. This not only reduces the effectiveness of repelling mosquitoes, but in hot weather, the ingredients are more likely to undergo chemical reactions, causing skin inflammation

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Mosquitoes do not distinguish between people’s blood types

Author: Fei Ming May 15, 2005, Sunday

It turns out that when we were discussing together, we always said that you have blood type A, which attracts mosquitoes easily, and you have type AB, which mosquitoes dislike the most. Your blood... Of course, it is also said that mosquitoes like people with type B blood, and people with type A blood want to find a dormitory roommate with type B blood. This can allow mosquitoes to be attracted to others and prevent them from biting you when they are hungry.

After reading the reference today, I learned that mosquitoes cannot distinguish people’s blood types.

However, as we feel, mosquitoes do have preferences when it comes to biting people. In the same dormitory, some people can always feel mosquitoes buzzing around their ears, while some people don't even feel that there are mosquitoes in the dormitory.

What mosquitoes want to eat is not blood, but sugary substances. The reason why mosquitoes (female mosquitoes to be precise) bite people is just to increase their reproductive capacity. Because human blood contains substances that mature mosquito eggs. If your blood is rich in cholesterol or vitamin B, female mosquitoes will like you more. The "chemoreceptors" on its tentacles are the tools it needs to find you.

Ha, also, if your dormitory has the kind of person with strong secretions and respiration, you are lucky. Because mosquitoes can easily find them through carbon dioxide and lactic acid secreted by the human body.

If you don’t want mosquitoes to bite you when you go to bed at night, you might as well advise your roommates to use perfume, soap or floral-scented daily necessities, so that they can attract mosquitoes.

Investigation~

·Mosquitoes choose targets based on smell

When humans exhale carbon dioxide and other odors, these odors will diffuse in the air, and these odors It's like the bell ringing for dinner, telling mosquitoes that a delicious meal is just around the corner...

·Wearing dark twill jeans is more likely to bite you

It turns out that mosquitoes are afraid of light but don't like too much light. Dark, prefers to suck blood in low light environments. During the day, when people wear dark clothes, the reflected light is darker, which is just what they want.

In addition, mosquitoes like to bite people with higher body temperatures...

·Mosquitoes like people with dark or red skin

People’s breathing will speed up after engaging in exercise or physical labor, and the exhaled There is relatively much carbon dioxide. The carbon dioxide gas will form a moist and warm airflow about 1 meter above the head. Mosquitoes are more sensitive to this and will smell it...

·O-type longevity A Type A loves to be bitten by mosquitoes

People with type A blood have almost no immunity to smallpox, and mosquitoes love to bite them more...

Type O lives long and type A loves to be bitten by mosquitoes - -Blood types are related to diseases (Health News)

According to the Russian "New Youth League" report, Russian medical scientists have found many evidences of the correlation between blood types and diseases. The following are their research results.

Experts believe that people with type O blood generally live longer; people with type A blood have almost no immunity to smallpox, and mosquitoes bite them more; people with type B blood rarely get cancer; and people with type AB blood rarely get cancer. People with this blood type have high body immunity.

People with type O blood are susceptible to diseases including gastric ulcers and duodenal diseases, liver cirrhosis, cholecystitis, appendicitis, bronchial asthma, abscesses, etc. Although they are more susceptible to illness, their average life expectancy is significantly longer.

People with type A blood are prone to staphylococcal suppurative infections, salmonellosis, tuberculosis, diphtheria, dysentery, influenza, atherosclerosis, rheumatism, myocardial infarction, epilepsy, chronic alcoholism and other diseases. .

People with type B blood are susceptible to diseases including dysentery, influenza, radiculitis, bone disease, genitourinary system, arthritis, etc. People with AB blood type are prone to septic infections, acute respiratory diseases, viral hepatitis and other diseases. According to statistics, people with AB blood type are more than three times more likely to suffer from schizophrenia than other blood types. However, the rate of tuberculosis and pregnancy anemia in AB blood type is much lower than that of other blood types.

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1. A good medicine for treating mosquito bites

Aro Naying H ointment 30g

The price is: 45 yuan

< p>There is also a large bottle: 100g, the price is 80 yuan

Indications: acne, rash, heat rash, eczema (itchy skin), chilblains, ringworm, knife wounds and insect bites, sun Moisturize for burns, skin breakdown (explosion), dry athlete's foot, mild burns, and after shaving.

Usage: Just like using cream, rub a very small amount of this medicine into your palms and rub it onto your face or other parts. You can also apply it directly to the affected area with clean fingers. (It must be applied until the white paste disappears to be effective)

Place of production: Japan

Specific use:

1. Mild medicinal properties, no irritation , does not damage the skin of young girls players, and has special effects on common skin diseases in children, such as eczema, prickly heat, and skin erosion caused by diapers.

2. If you are bitten by mosquitoes, fleas, bedbugs, sandflies and other insects, apply Oronain H ointment to eliminate pain and relieve itching.

2. When suffering from burns, applying Oronain H ointment can quickly eliminate the pain and leave no scars after recovery.

3. For skin injuries such as cuts and abrasions, applying Oronain H ointment can sterilize and prevent inflammation. There is no need to use other disinfectants (such as iodine or red syrup, etc.)

4. For pimples caused by shaving, Oronain H ointment can quickly resolve the problem. This agent has a fragrant smell and can be used after shaving to make you feel more comfortable and prevent skin disease infections.

5. Use it as foundation before makeup to protect and moisturize the skin. Apply it after washing your face in the morning and evening to remove facial spores, acne and acne.

6. Use Oronain H ointment after washing dishes and clothes, which can protect the skin and prevent roughness, especially in winter. It can also moisturize the skin such as frostbite and cracks.

7. If your hands and feet are injured due to friction, blistering, or sunburn, using Oronain H ointment will work quickly and is easy to carry and use. It is a must-have for sea bathing when traveling in the countryside.

8. Oronain H ointment is used for stubborn skin diseases. It has excellent efficacy and does not stick to clothes. It is the most ideal medicine.

9. Athlete's foot is the most stubborn and difficult to treat skin disease. Using Oronain H ointment can sterilize, reduce inflammation, relieve pain, and relieve itching. Use it in summer and you will feel comfortable.

This medicine is very good. We have been using it to treat mosquito bites.

2. The area where a person is bitten by mosquitoes will be red, swollen, itchy and painful. If you apply soapy water to the bite, you can reduce the symptoms.

When mosquitoes bite people and suck blood, they spit out venom - formic acid. Formic acid is highly corrosive and can make the skin red, swollen and itchy; when alkaline soapy water and acidic formic acid meet, "acid-base neutralization" reduces the toxicity of formic acid. Therefore, using soapy water to treat the itching pain after mosquito bites is indeed an effective "homespun" method.

3. Let me introduce a method to treat mosquito bites. It’s not really a secret recipe! Apply 999 Dermatitis Ping Ointment to the bite area! It’s more effective

Let me tell you about my own experience in preventing mosquito bites. I often go fishing in the wild, but I don’t get bitten a few times in a summer. This is mainly because I often smell Narcissus brand wind oil throughout the summer. Wow, I think it works quite well! I smell it when I have nothing to do, it refreshes my mind, and I even add Fengyoujing when I smoke! But this may also be one of the reasons. I have type A blood and I am not easy to be bitten.

Reference materials: online