Why do people need bacteria? Ask the experts to explain in detail!

The relationship between bacteria and humans is symbiotic.

Bacteria are inseparable from humans, humans are the only host for many bacteria, it can only parasitize in the human body, can not reproduce in other animals, there are many normal flora growing in the human body, especially in the intestines, these bacteria help you digest food, and the normal flora in the human body will help the body resist foreign invasion to a certain extent when pathogenic bacteria invade the body.

Bacteria and humans get along

Perhaps we all know that food should be varied, and what is the purpose of food variety? Is it to provide more nutrients for our bodies, or is there another reasonIn a far-reaching study, scientists surveyed 178 nursing home residents between the ages of 70 and 102, half of whom were daycare and half were permanent residents.

They found that within six months, the microbial composition of all the elderly residents who ate in the canteen became similar. The menu of the cafeteria is unchanging. Unfortunately, the bacterial composition in their bodies is not healthy, there is a lack of diversity, common beneficial bacteria are missing, and they show a state of high inflammation.

Those who live in daycare sometimes cook their own meals and do not eat in the cafeteria, and their microbial makeup is healthier than that of the resident elderly. There were some differences in the biological composition of long-term residents, but after a year of living in a nursing home, all the elderly people became very similar and unhealthy.

Humans and bacteria have a symbiotic relationship.

The relationship between humans and bacteria is not a hostile relationship, but a long-term coexistence and interdependence. There are about two kilograms of bacteria in the body and on the surface of healthy humans, which silently maintain the balance of the human body, help digest and absorb nutrients, and regulate immune function. Superbugs.

It was mutated from these common bacteria.

Due to some misconceptions, some people treat germs with a sworn and incompatible view. Once the bacteria are detected, I want to destroy them all, hoping that my body will be clean and completely sterile. However, some bacteria have coexisted peacefully with us for hundreds or even thousands of years, and if this balance is disrupted, it can be detrimental to our health.

Ways of nutrition for bacteria:

The nutritional modes of bacteria are autotrophic and heterotrophic, among which heterotrophic saprophytic bacteria are ecosystems.

is an important decomposer that makes the carbon cycle.

I can proceed smoothly. Some bacteria fix nitrogen, which converts nitrogen into bioenergy.

Forms of utilization. Bacteria also have a great influence on human activities.

On the one hand, bacteria are the causative agents of many diseases, including tuberculosis.

Gonorrhea, anthrax, syphilis.

Diseases such as plague and trachoma are caused by bacteria. However, bacteria are also often used by humans, such as the production of cheese and yogurt, the manufacture of some antibiotics and the treatment of wastewater. In the field of biotechnology, bacteria are also widely used.

The above content referencePeople's Health Network - Bacteria and humans are a happy couple.

Bacteria are closely related to humans.

Most species of bacteria are beneficial to humans: legumes.

There are many granular nodules on the root system, and rhizobia live in the root nodules.

It converts nitrogen from the air into:"Fertilizers"It is used by legumes, so legumes can grow well without artificial fertilization.

Acetic bacillus and monosodium glutamate are required to make vinegar.

Corynebacterium is required, and methane bacteria are required to make biogas. In addition, papermaking, tanning, sugar refining, and fiber extraction also require the action of bacteria, which are widely used in food processing and industrial production.

Bacterial species: 1. According to the shape, it is divided into three categories, namely: cocci, bacilli and spirochetes.

Including Vibrio, spirobacteria, Helicobacter.

2. According to the lifestyle of bacteria, it is divided into two categories: autotrophic bacteria and heterotrophic bacteria, of which heterotrophic bacteria include saprophytic bacteria and parasitic bacteria.

3. According to the oxygen demand of bacteria, it can be divided into aerobic (completely aerobic and microaerobic) and anaerobic (incomplete anaerobic, aerobic tolerant and completely anaerobic) bacteria.

4. According to the classification of bacterial survival temperature, it can be divided into three categories: cold-loving, normal temperature and high-temperature preference.

The above content refers to the Encyclopedia - Bacteria.

The relationship between bacteria and humans is interdependent, mutually beneficial coexistence, parasitism, etc.

On the one hand, bacteria are the causative agents of many diseases, which can be transmitted between normal human bodies through various ways, such as contact, digestive tract, respiratory tract, insect bites, etc., which are highly infectious and extremely harmful to society.

On the other hand, bacteria are also often used by humans, such as the production of cheese, yogurt and wine, the manufacture of some antibiotics, and the treatment of wastewater. In the field of biotechnology, bacteria are also widely used.

Viruses are different from bacteria

Viruses have no cell structure and can be said to be the lowest organisms, but their ability is not small, and human diseases are related to small colds and large cancers.

Bacteria, like plants, have cell walls, while human cells do not have cell walls, which is the principle of many antibiotic sterilization. For example, if you destroy its cell wall or prevent it from being synthesized, the bacteria will die, and people don't have this structure, so it has no effect on people.

We live in a world full of bacteria and viruses, and we can say that there are many bacteria in our body, and even in terms of quantity, the number of bacteria on the surface of the body and in the intestines is 10 times that of cells. But why our bodies are still very healthy, mainly because most of the bacteria in the body are harmless to the body, and they coexist peacefully with the finger cells. Even if some bacteria enter the gastrointestinal system with food, stomach acid will destroy most of them, even if they carry stomach acid, enter the intestines, be absorbed into the bloodstream, and our body's strong immune system waits.

Of course, everyone's physique is different, and there is also a gap in immunity, such as children under 5 years old and the elderly over 65 years old, whose immunity is relatively poor, is more likely to be defeated by "bacteria".

In other words, we can't live in an absolutely clean or safe world. We only choose food as fresh and clean as possible, and don't eat food if it is moldy and spoiled. In addition, through the diversity of diet, correcting bad habits such as staying up late, smoking and drinking, strengthening exercise, and improving one's immunity in many ways, you can prevent the invasion of bacteria and viruses to the greatest extent.

Some studies have found that too clean or hygienic celery is more likely to develop immune diseases such as asthma and inflammatory bowel disease.

Of course, it does not mean that all bacteria in nature are friendly, such as Salmonella, E. coli, Listeria monocytogenes, etc., they are usually hidden in common food, if not cleaned or disinfected thoroughly, it is easy to be eaten into the stomach, leading to the occurrence of diseases. It is easy to cause people to have diarrhea, vomiting and other toxic reactions.

Humans and bacteria have a symbiotic relationship.

Bacteria in the digestive tract are the main body of the human flora, and in the digestive tract, most of the bacteria are concentrated in the colon. According to previous research data, the volume of the colon of a standard person is about liters, and the bacterial content of the contents is about one gram per gram. From this, it is estimated that the number of bacteria in a standard person is approximately.

Some bacteria can cause harm to humans, such as Mycobacterium tuberculosis, but most bacteria are beneficial to humans, such as actinomycetes, which produce substances that inhibit or kill bacteria.