In fact, male mosquitoes do not suck blood, but only plant juice, so they generally do not enter the house. Only when it gets cold in autumn will it run indoors to avoid the cold. Blood-sucking mosquitoes are all females. Blood-sucking is to increase nutrition and reproduce. When they are full, they will find a place with water to lay their eggs. Mosquitoes usually start to emerge in May (no wonder there are so many now! ), reaching the peak of activities in the middle and late August. When the climate gets cold in autumn and the temperature drops below 10 degrees Celsius, it will stop breeding, go into hibernation without eating, and come out after waking up the next spring. My favorite temperature is about 30 degrees Celsius, which is unbearable. Their living and breeding environment must have water, so groundwater, stinking ditches, sewers and mosquitoes all choose their objects by smell. Scientists' research shows that mosquitoes bite people selectively, and those who can bring mosquitoes rich cholesterol and vitamin B are most favored by mosquitoes. Mosquitoes use their sense of smell to find the object that suits their "appetite" best from the crowd. Cholesterol and vitamin B are essential nutrients for the survival of annoying insects such as mosquitoes, and they cannot produce these substances by themselves. Mosquitoes have a strong sense of smell. When humans exhale carbon dioxide and other smells, these smells will spread in the air. These smells are like the bell for dinner, telling mosquitoes that a good meal is just around the corner. When a mosquito tracks a target, it always twists and turns with the smell of people's breath until it touches the target and then falls on the skin, patiently looking for a "breakthrough". Finally, directly insert the "needle tube" into the skin to suck blood for 8- 10 seconds. Mosquitoes do have this "food preference". This is not because some people think that their skin is tender and their blood is sweet, which attracts mosquitoes. The main reason is that some of their breaths attract mosquitoes. Generally speaking, mosquitoes have a soft spot for the following people: First, people with developed sweat glands and high body temperature. People who like sweating, the acidity in the blood is enhanced, and the discharged sweat makes the lactic acid value on the body surface higher, which is attractive to mosquitoes. In addition, mosquitoes have a heated body in their antennae, which is very sensitive to temperature. As long as the temperature difference changes a little, it can be detected immediately. People who sweat lose heat quickly and attract mosquitoes. Second, people who are tired or breathing faster. People will breathe faster after engaging in sports or manual labor. Some people have larger lung capacity or faster breathing rhythm. In this way, the exhaled carbon dioxide is more, and the carbon dioxide gas will form a moist and warm airflow at the height of 1 m above the head. Mosquitoes are sensitive to this and will smell it. This shows that your body is overwhelmed, so you should go home and rest immediately, and don't overdraw your physical strength, so as not to cause more problems. Third, people who like to wear dark clothes. Mosquitoes don't sleep during the day and go out at night, mainly because they have the habit of dark. If they wear dark clothes, they will have a black shadow at night, and mosquitoes will chase them to darker places. The color of clothes, such as black, is the first choice for mosquitoes to attack, followed by blue, red and green. Mosquitoes don't like to bite white. Similarly, mosquitoes like to bite people with dark skin or red skin. Fourth, people with fast metabolism. So children are easily bitten by mosquitoes, while old people are just the opposite. Fifth, people who have made up. In order to verify the allure of smell to mosquitoes, American scientists tested and analyzed more than 3,900 substances with olfactory instruments. It is found that hair gel, hand cream, facial cleanser and other cosmetics are very attractive to mosquitoes. Most cosmetics contain stearic acid (a fatty acid), so people who wear makeup are more favored by mosquitoes than those who don't wear makeup. Of course, there are also some smells that mosquitoes hate. The smell of bay leaves, lemongrass oil, citronella, garlic and geraniol will keep mosquitoes away. Sixth, pregnant women. (Xiangya should not) Pregnant women are particularly prone to attract mosquitoes. A medical study in the United States shows that pregnant women are particularly attracted to mosquitoes, and the probability of being bitten by mosquitoes is twice that of other women. Seventh, people who drink. People are also easily bitten by mosquitoes after drinking alcohol, eating beef and mutton or taking antihypertensive drugs. How to reject "red envelope" 1? Take a bath as soon as possible after exercise to keep your skin fresh. It's hot and sweaty, so wipe off the sweat with paper towels and handkerchiefs in time. 2. If there are many mosquitoes in daily activities, wear long-sleeved clothes. This is not because mosquitoes can't stick needles in it to suck blood with an extra layer of cloth. In fact, the needles of mosquitoes are very sharp, even cowhide and thick jeans can penetrate, and the clothes worn in summer are simply unbearable. The function of clothes is mainly to cover up the smell of skin secretions such as sweat, so that mosquitoes can't track it. 3. It is best to wear white clothes for outdoor sports, because white clothes have strong reflective ability and can drive away Aedes mosquitoes. Don't wear socks because it is too hot in summer, which will make the sweat evaporate quickly and attract mosquitoes to attack other parts of the human body. Wearing socks with good sweat absorption effect can not only effectively reduce skin humidity, but also cover up odor. 5. It is not advisable to use irritating cosmetics such as perfume in places where there are many mosquitoes. Why is it swollen when bitten by mosquitoes? Actually, it should be said that it was bitten by mosquitoes. Mosquitoes cannot open their mouths, so they don't bite the skin. In fact, they pierce people's skin with six needle-like structures, and these probes form the center of the mouthparts for eating. These oral needles suck blood just like blood needles; Mosquitoes also excrete saliva containing anticoagulant to prevent blood coagulation, so that they can be safely eaten. Mosquitoes ate, drank and drifted away, leaving behind an itchy and swollen bag. The following measures can be taken to relieve itching: 1. After being bitten by mosquitoes, most people will have symptoms such as redness, itching and pain. At this time, you can use alkaline substances to relieve itching, such as ammonia water, or you can use soap dipped in water to apply it to the redness and swelling, which will stop itching in a few minutes. 2. If the bite is itchy, you can play it with your fingers first, and then apply toilet water and wind oil. 3. Applying or brewing the itchy place with salt water can soften the lump and effectively relieve itching. The juice in aloe leaves can be used to relieve itching. When you are red, swollen and itchy after being bitten by mosquitoes, you can cut a small piece of aloe leaf, break it after washing, and rub it a few times at the red and swollen place to reduce swelling and relieve itching. In addition ~ ~ ~ As long as you are willing to change the diet of alkaline vegetables, your body and blood are slightly alkaline. Mosquitoes not only don't like to bite, but they don't itch too much even after being bitten!

Physical mosquito repellent coup

After we understand the living habits of mosquitoes, what are the good ways to deal with mosquitoes? Teach you a few tricks: the first trick of physical mosquito repellent: eliminate the living environment of mosquitoes (there is nothing to do in the dormitory, and there is too much grass garbage below). Some people have poor living environment and a lot of water around them, so they need to be sprayed frequently, which is not only difficult to kill mosquitoes, but also costs a lot of money. So we might as well use some physical methods to kill mosquitoes. Solution: Clean up the garbage in time and don't leave water. The second measure of physical mosquito repellent: soap silk+washing powder water put a basin at home and add some soap silk mixed washing powder water to the basin. The next day, there will be some dead mosquitoes in the basin If this method is used continuously every day, it is almost unnecessary to spray pesticides to kill mosquitoes. Moreover, there will be fewer and fewer mosquitoes. The third measure of physical mosquito repellent: garlic, vitamin B and two magic weapons to win mosquito repellent. You must try it. It is the fourth measure of physical mosquito repellent with garlic and vitamin B: salt water, toothpaste, hot towels and so on. If you are bitten by a mosquito, don't scratch it with your hands. A little salt water or toothpaste applied to the affected area can help you stop itching quickly. Mosquito venom can be dissolved at high temperature. After being bitten by mosquitoes, mosquito venom is most afraid of high temperature. Apply it with a hot towel for 5 minutes immediately. Or use a thermos bottle stopper (of course, there must be hot water in the bottle) to iron it a little and apply a small bag, so it won't burn. Physical mosquito killing takes 3-5 minutes. The fifth measure: plant efficacy, you can put dried oranges or roses indoors to drive away mosquitoes. The sixth trick: there are no mosquitoes in my house. Creating a green space is everyone's dream, especially for people with allergies and respiratory diseases, especially delicate children and pregnant women. Screen window is commonly used and the most effective. Window screening, the size of the yarn hole should be appropriate; When loading yarn, leave a little margin to cover some window seams. Installing a screen window can only stop most mosquitoes, and the next thing to do is crucial:

Natural mosquito repellent coup

1, put a few boxes of essential balm and cooling oil in the room, or put some mint on the wall. 2. Sprinkle some perfume on your body or pillow. 3, frequent bathing to reduce the smell of secretions, can prevent mosquito bites. 4. Grind the mothballs and scatter them in the corner of the house. Burning dry tea or orange peel can drive away mosquitoes. 6. Plant one or two tomatoes in an indoor flowerpot. The smell of tomato branches and leaves will drive away mosquitoes. Applying some tomato leaf juice to your body can also prevent mosquitoes. 7. Hang a handful of shallots under the lamp, or wrap a few shallots with gauze, so that all kinds of bugs will not fly. 8. Cover the light bulb with orange cellophane or silk. Mosquitoes are most afraid of orange light Edit this paragraph. Can mosquitoes spread hepatitis C?

Biocompilation: Could some cases of hepatitis C infection with unknown causes be caused by mosquito bites? The researchers found that the virus can combine and replicate in mosquito cells, which provides some evidence for this possibility. However, many experts disagree that mosquitoes can spread hepatitis C virus. About1700,000 people in the world are infected with hepatitis C virus, causing liver inflammation, which may eventually lead to cirrhosis and liver cancer. In most cases, the virus is transmitted through infected blood products and contaminated needles, but about 20% of infected people do not have this risk factor. Hepatitis C belongs to flavivirus, which includes viruses that can be transmitted by insects, such as West Nile virus, dengue virus and yellow fever virus. This makes the research team led by Emmanuel Drouet of the University of La Tronche, France, the first university of Joseph-Fourier Grenoble, begin to doubt whether hepatitis C virus can replicate in mosquito cells. The researchers isolated the hepatitis C virus from a person infected with it, and added it to the cells of Aedes pseudosheath and the kidney cells of African green monkeys, both of which are commonly used culture cell lines of other flavivirus. In the Journal of Medical Virology published in May this year, the research team reported that by measuring the RNA level of the virus up to 28 days after infection, the virus can combine with the cells of mosquitoes and monkeys and replicate within the cells. On the contrary, in human B-cell living liver cancer cells, the infection failed after about one week. Derouet said that this may indicate that mosquitoes may spread hepatitis C virus, although no one has found hepatitis C virus in mosquitoes. Michael Turell, an entomologist at the US Army Center for Infectious Diseases Medicine, said that it is not surprising that hepatitis C virus can replicate in mosquito cells because of its relationship with flavivirus. Many scientists strongly oppose the idea that mosquitoes can spread hepatitis C. They point out that there is no geographical or seasonal distribution of hepatitis C virus infection, which is the characteristic of mosquito transmission. They think that some unexplained cases may be just sexual transmission or conceal the fact of drug abuse. "There is still no evidence that mosquitoes spread the disease," said David Thomas, an epidemiologist at Johns Hopkins Medical College. From the point of view of evolution, the host must have appeared before the parasite, so the parasite did not exist at all before the evolution of the host. So the mosquitoes and roundworms you mentioned obviously didn't exist before the appearance of higher animals. At that time, only primitive arthropods (primitive mosquitoes) and linear animals (primitive nematodes) existed, all of which lived freely, sucking nectar or eating microorganisms, organic matter, algae and so on. Since the appearance of higher animals, they have gradually evolved into parasitic species in several different ways. The following is the origin of parasitic relationship: there are three ways: 1, from space connection to food connection. There is a simple * * * habitat first, and then the transition to the host body, and then into the body * * * habitat, different degrees of * * * habitat for the development of nutrition links to establish the foundation. Food connection may be just a kind of partiality, which is beneficial to one party at first and harmless to the other. In the further development, it may appear that one party depends on the other party's body fluids to maintain life, that is, it develops into a parasitic relationship; It is also possible that the two sides use each other's metabolites to develop a mutually beneficial relationship. 2. The transition from predation to parasitism. Traces of transition are still preserved in nature. For example, the European leech (Glossiphonia complanata) is a free-living predator that devours small invertebrates as a whole; The yellow leech (naemopis) is the same as the flat-tongued leech when devouring small animals, but the attack and blood sucking on large animals are temporary. Hameadipsa, who lives in the bushes, no longer adopts other nutrition methods, but only relies on the exclusive and temporary parasitic life of sucking the host blood from time to time. All the life activities of inchworm are on the fish body, and only leave the host during the breeding period. The third way is that the future host will sneak into the body accidentally. Although the host is a temporary living place, it is very beneficial to parasites and successfully becomes a facultative parasite. Parasitic relationship can evolve in different directions after it comes into being in three ways: habitat, predation and accidental parasitism. The co-evolution of parasites and hosts often weakens the harmful "negative effects" and even evolves into a mutually beneficial relationship. Therefore, it can be said that mosquitoes and roundworms appeared very late until they were completely parasitic. Mosquitoes in the primitive state make a living by sucking tree sweat, each as big as one meter and more than two meters. Life is very fragile because it attracts tree sweat. Later, in order to adapt to life and various environments, it evolved into blood sucking and became very small. In primitive areas such as Africa, there is also a saying of "three mosquitoes and one dish". Edit this paragraph and film the mosquito sucking blood.

A mosquito is sucking blood. Did you slap it in the past and let it "break into pieces" to dispel your hatred, or did you wave it away? Do you dare to vent your hatred when you read the report that "killing mosquitoes that are sucking blood will lead to death" in authoritative medical journals? Shooting a mosquito that is sucking blood will kill people. The cause of the incident was a report in the New England Journal of Medicine: A 57-year-old woman in Pennsylvania, USA, killed a mosquito, causing her muscles to be infected by fungal microsporidia and died. The researchers speculated that the woman shot the mosquito to death on the skin, and the smashed mosquito debris entered the skin, causing infection. Because the New England Journal of Medicine is the longest-running medical magazine in the world, this incident has attracted more attention from netizens. It is almost shocking that killing a mosquito that is sucking blood will lead to death. Some experts have analyzed that mosquitoes will leave wounds on their skin when they suck blood. When it is sucking blood, if it is suddenly killed by a shot and the mosquito's mouthparts are too late to be pulled out, then the wound on human skin will not heal. The deadly fungi carried by mosquitoes may invade the body with the unhealed wound, causing bacterial infection and eventually leading to death. Of course, if people have wounds and are infected with fungi carried by mosquitoes that have been photographed, it will also be very dangerous. The mosquito "bloody case" triggered a hot discussion among netizens. Coyle, one of the authors of the article in the New England Journal of Medicine and Albert Einstein College of Medicine in new york, seriously put forward a seemingly ridiculous suggestion: "If a mosquito is biting, it is better to bounce it off gently than slap it to death." Many netizens have had a heated discussion on the "bloody case" caused by mosquitoes. Many netizens shouted: "It's terrible. I won't dare to fight mosquitoes in the future." Some people said half humorously and half seriously, "That means you are either killed or itchy!" "You're kidding! I don't know how many bloodsucking mosquitoes have been killed since I was born. Isn't it a hundred times? Now I am dead! " A netizen thinks this kind of incident is incredible. More netizens questioned. Under normal circumstances, such a thing is impossible. Professor Li Pingfei, deputy director of the Pest Control Department of Changsha CDC, said that such incidents rarely occur and the probability of such incidents can only be said to be "very low". Although mosquitoes spread many diseases, whether people get sick depends on two factors: one is the virulence and quantity of viruses, and the other is the strength of human resistance. When the human body has strong resistance and the virus is weak, the virus is eliminated. On the contrary, people will get sick. Li Pingfei said that the pathogens of most diseases transmitted by mosquitoes must first enter mosquitoes for proliferation and development, and then be released through saliva before they can infect people. This is an indispensable link in the natural circulation of pathogens. Mosquitoes are the most important vectors of insect-borne diseases. Therefore, the monitoring of mosquitoes in Changsha CDC is relatively comprehensive, including the methods of attracting mosquitoes by using their phototaxis, attracting mosquitoes to attract eggs and collecting water containers. Therefore, it is impossible to kill mosquitoes that are sucking blood in Changsha, and citizens need not panic. Edit this passage about how mosquitoes smell and bite people.

Mosquito bites people selectively, and people who can bring mosquitoes rich cholesterol and vitamins are most favored by mosquitoes. Mosquitoes use their sense of smell to find the object that suits their "appetite" best from the crowd. Cholesterol and vitamins are essential nutrients for the survival of annoying insects such as mosquitoes, and they cannot produce these substances themselves. Mosquitoes have a strong sense of smell. When humans exhale carbon dioxide and other smells, these smells will spread in the air. These smells are like the bell for dinner, telling mosquitoes that a good meal is just around the corner. When a mosquito tracks a target, it always twists and turns with the smell of people's breath until it touches the target and then falls on the skin, patiently looking for a "breakthrough". Finally, directly insert the "needle tube" into the skin to suck blood for 8- 10 seconds. Most cosmetics contain stearic acid (a fatty acid), so people who wear makeup are more popular with mosquitoes than those who don't wear makeup. As for a person's cholesterol level, it will not affect the judgment of mosquitoes unless there is enough cholesterol stored near the epidermis. Of course, there are also some odors that mosquitoes hate, such as bay leaves, citronella oil, citronella, garlic and geraniol. The probability of pregnant women being bitten by mosquitoes is higher than that of non-pregnant women 1 times. The gas exhaled by women during pregnancy contains many different chemicals, so it becomes the target of Anopheles mosquitoes. In addition, pregnant women have higher body temperature and sweat more, which is a good base for skin bacteria to breed. These two reasons make pregnant women more vulnerable to mosquito bites than other women. Many people think that the stronger the pungent smell, the better the mosquito killing effect. Strong pungent smell is harmful to human body. For example, some people with allergic constitution may be allergic to cigarettes, smells and even the active ingredients themselves, which may cause some discomfort. In addition, for the elderly, children, pregnant women or asthma patients, because they are all susceptible people, other people who also use certain mosquito repellent products may feel at ease, but they are likely to feel uncomfortable. Therefore, it is best to choose mosquito repellent products that are smokeless and tasteless and have little irritation to them. At the same time, it is suggested that you should keep the window half open when using them. In addition, many people are used to lighting mosquito-repellent incense before going to bed at night, but in fact, outdoor mosquitoes love to fly into the house at dusk to attack people. If mosquito repellent is used at night, it can effectively prevent outdoor mosquitoes from flying into the house through the gap between doors and windows, and can also make mosquitoes originally in the house be smoked away, thus reducing the number of mosquitoes indoors. It takes about two hours for mosquito-repellent incense to spread evenly in the room after it is lit, so the best mosquito repellent time should be at night or two hours before going to bed. Edit this paragraph. Who do mosquitoes like to bite?

Note: Mosquitoes can't tell a person's blood type. Please don't add that mosquitoes like a certain blood type. Mosquitoes can't tell the blood type. Don't say it's because of the lame non-scientific theory of "sweetness". Please look at it scientifically! ) Sweat a lot. Sweat contains a lot of amino acids, lactic acid and ammonia compounds, and mosquitoes are very sensitive to it. Once they smell these substances, they will have an appetite. The skin is tender. Too good skin is sometimes not a good thing. White and tender skin thinks that only you like it, and people and mosquitoes like it. You can enjoy food with a slight sting, and mosquitoes want to do this kind of effortless good thing. The smell of milk. Babies are easily attacked by mosquitoes for two reasons: First, babies are incapable of parking and there is no danger to mosquitoes. Second: the baby has a strong smell of milk, and mosquitoes come by smelling the fragrance. Breathing heavily. People with large lung capacity naturally breathe deeply and long, exhaling more carbon dioxide, and mosquitoes gather after smelling it. Mosquitoes prefer to bite women. Why? A recent study shows that most cosmetics contain stearic acid, which mosquitoes like very much, so women are more popular with mosquitoes. Therefore, people who can bring mosquitoes rich cholesterol and vitamins are most favored by mosquitoes. Mosquitoes use their sense of smell to find the object that suits their "appetite" best from the crowd. Cholesterol and vitamins are essential nutrients for the survival of annoying insects such as mosquitoes, and they cannot produce these substances themselves. Mosquitoes have a strong sense of smell. When humans exhale odors such as carbon dioxide, these odors will spread in the air. Mosquitoes always follow the smell of human breath until they touch the target, then fall on the skin to patiently find a "breakthrough", and finally insert the "needle tube" directly into the skin to suck blood for 8- 10 second. Judging from the above situation, most of the biting objects selected by mosquitoes rely on judging the smell emitted by the bitten person. To change this situation, you can try to change your own smell and avoid being bitten by mosquitoes. Wearing dark twill jeans is easy to bite. It turns out that mosquitoes are afraid of light but don't like it too dark. They like to suck blood in low light. During the day, people wear dark clothes, and the reflected light is dark, just to their liking. Besides, mosquitoes like to bite people with higher body temperature ... mosquitoes like people with dark or red skin. People will breathe faster and exhale relatively more carbon dioxide after engaging in sports or physical labor. Carbon dioxide gas will form a moist and warm airflow about 1 m above their heads. Mosquitoes are sensitive to it and will smell it ... Edit this paragraph. Tips for relieving itching after mosquito bites.

1. Use sliced garlic. Rubbing the bitten part repeatedly for one minute has obvious analgesic, antipruritic and anti-inflammatory effects. Even if the bitten part has become a big bag or is inflamed and ulcerated, it can be rubbed with garlic. Generally 12 hours can reduce inflammation and swelling, and the festering wound can heal after 24 hours. People with allergic skin should use it with caution. 2. Wipe mosquito bites repeatedly with watermelon skin to relieve itching. 3. Apply a small amount of Huoxiang Zhengqi water to the bitten part for about half an hour to relieve or eliminate itching. 4. Apply a little toothpaste or crushed mint to the bitten part, and it will immediately feel cool and comfortable, and the itching will disappear. 5. Take one or two aspirin, grind it into powder, mix it with cold water and apply it to the affected area, which can also reduce or eliminate itching. 6. When drinking porridge, you might as well wait for a few minutes. After the surface of porridge condenses into a film, it can also relieve itching by applying it to mosquito bites. 7. Soap is used to relieve itching. When a mosquito bites, it secretes an organic acid-formic acid in its mouth. This substance can cause muscle itching. Soap contains sodium salts of higher fatty acids, which are alkaline after hydrolysis. The alkalinity of soap is neutralized by the acidity of formic acid, which quickly eliminates pain. 8, washing powder to itch. Rinse the bitten part with clear water, don't dry it, and then dip a little washing powder with wet fingers and apply it to the bitten part, which can immediately stop itching and the redness will soon disappear. After the redness disappears, rinse the washing powder with clear water.