There are so many germs on the fly, why doesn t it get sick on its own

Flies have historically been classified as one of the four pests, and they prefer to live on droppings and decaying plants and animals. **dirty** there will be flies. Flies fly around on the dirt, and many bacteria get on it, it feeds on the dirt, and there are tens of millions of bacteria and other pathogens hidden in the two sons.

Most of these bacteria are harmful to the human body, such as typhoid bacilli, dysentery bacillus and other pathogens. But these bacteria are not harmful to the flies themselves. This is because some microorganisms that can cause human disease can survive or reproduce in the vector insect, but they are harmless to the insect itself.

This is due to an adaptation between pathogenic organisms and vector insects over a long period of historical evolution. Moreover, many of the bacteria infected by the flies' bodies are mainly hidden in the digestive tract. According to experiments, many bacteria that are harmful to the human body only live in the digestive tract of flies.

In five or six days, some of them die, and some of them are excreted with feces and will not survive in the flies for a long time. In addition to this, there is an antimicrobial active protein present in flies.

For these reasons, flies stay in dirty places and carry a lot of bacteria on their bodies, but these bacteria do not make them sick. However, flies are very harmful to people, and their ability to spread germs is great. Therefore, we should do a good job of sanitation and get rid of flies.

Because flies have strong immunity, its larvae (maggots) live in worse conditions, so the Compendium of Materia Medica calls maggots "god worms" and can be used in medicine.

Nowadays, many people have begun to breed maggots for food and medicinal purposes, and the taste is as delicious as shrimp.

Of course, it is raised under sterile conditions with high-protein ingredients such as milk powder.

Flies even eat poop, and that little germ is a bird.

Flies are familiar and disgusted insects, they have a wide variety of species, and the main harm to humans is to spread diseases. Studies have found that flies can carry.

There are more than 60 kinds of bacteria, and a fly can have more than one million bacteria on its body surface, and the most can carry about 500 million. Flies carry and transmit many pathogens, which can transmit dysentery, typhoid, cholera, poliomyelitis, tuberculosis, trachoma, hepatitis, parasitic diseases and other diseases.

Common flies in people's lives include houseflies, toilet flies, mercerized green flies, big-headed goldflies, black-tailed hemp flies, etc. The life of a fly can be divided into four stages, that is, from the adult fly mating and laying eggs, through the egg-> larva (maggot) - > pupa - > the process of adult fly, this process only takes about 10 days, and can be shortened when the temperature is high. Flies can lay eggs for life when mated once, and a fly can reproduce thousands of flies in its lifetime.

Spring is the peak of the first generation of adult flies, and the elimination of one fly in the spring is equivalent to the elimination of tens of thousands of flies in the summer.

Flies breed and fly among garbage heaps, toilets, rotting animal carcasses, pus, blood, sputum and vomit and feed on them. It carries tens of thousands of bacteria, viruses and parasite eggs on its body and abdomen. Flies have the habit of eating, spitting and pulling, and he flies down to **, ** food and utensils will be contaminated by bacteria, viruses, and insect eggs, and when people eat contaminated food or use contaminated utensils, intestinal infectious diseases or parasitic diseases can occur.

Why don't flies with bad habits get infected by viruses? Flies carry germs all over their bodies, so why aren't they infected by germs? It turns out that when it eats Huzhao food with a variety of germs, it can be quickly processed in the digestive tract of the pants Dankai, quickly ingesting foods with nutritional value, and quickly excreting useless dross, waste pants and germs from the body.

This process usually takes only 7-11 seconds. After the bacteria enter the body of the fly, they are called out of the body before they have time to reproduce, and such a high efficiency is incomparable to other animals - the fastest for mammals takes dozens of minutes, and humans are basically a day. Therefore, when people eat food with germs and cannot excrete it in time, they will suffer from gastroenteritis.

If the opponent happens to be a germ that is rapidly multiplying late, the fly's immune system will also shoot two globulins at the germ and**. Interestingly, the bactericidal power of these two globulins is thousands of times stronger than that of penicillin.

As early as the 60s of the last century, Japanese scientist Professor Shunji Natori isolated a small molecule protein from the digestive tract of flies, and dropped it on the culture medium of typhoid, cholera, dysentery, encephalitis, enteritis and other bacteria, and most of the pathogenic bacteria that grew well dissolved and died. It is this bactericidal substance that keeps the flies in the germs and never gets sick. After the research of many scientists, similar antimicrobial proteins have also been found in the bodies of other insects and mammals, and science has named it antimicrobial peptides.

Antimicrobial peptides are produced by insect hemolymph, and at present, scientists have isolated dozens of antimicrobial peptides from Diptera and Lepidoptera insects. They are easily dissolved in water, have a killing effect on a variety of germs, and are a broad-spectrum bactericidal substance. They are designed to deal with prokaryotic bacteria and diseased eukaryotic cells and are very safe for humans.

Scientists from our cavity country used purified silkworm antimicrobial peptides to attack cervical cancer cells Hungerzhou and Yinwei Zhongdao Trichomonasis, and the lethality was obvious. Antimicrobial peptides can also effectively kill human parasites, and also have a toxic killing effect on the protozoa in the body of the tsetse fly, bringing hope to the ** of Lyme disease on the African continent. Nowadays, almost all pathogenic bacteria have developed varying degrees of resistance to antibiotics, and anti-infection has become a major problem for doctors.

According to medical reports, grape-like.

Category: Education Science & Technology Analysis: Many bacteria infected by flies are mainly hidden in the digestive tract.

Most of these bacteria are harmful to humans, such as typhoid bacillus, dysentery bacillus and other pathogens, but they are not harmful to the flies themselves. Because some disease-causing microorganisms, although they can survive quietly in the body of the vector insect, or can reproduce, they will not cause harm to the insect itself. This is due to the adaptation between the pathogenic microorganism and the vector insect in the long-term evolutionary process.

According to experiments, many bacteria that are harmful to humans only live in the digestive tract of flies for five or six days, some of them die, and some of them are excreted with feces. So, although flies stay in dirty places and carry a lot of bacteria in their bodies, these bacteria do not make it sick.

Hello, come first.

If the bacteria are on the surface of a fly, they are as pathogenic as bacteria are on the surface of a person. If flies are used as carriers of disease transmission, that is, in the body of flies, then flies have a name called intermediate host in epidemiology, and pathogens such as bacteria will not attack the intermediate host in order to be able to spread smoothly to intermediate hosts such as humans.