Few people boast one hundred percent health. Surely, each of us at least once in our life has experienced unpleasant symptoms of an infectious disease. They all manifest themselves in different ways, but the cause of this or that “sore” in almost all cases is the same - pathogenic microorganisms. It is they who penetrate us from the outside and begin their insidious activities to introduce the infection. In order to determine the methods of struggle and the expulsion of the little "invaders", first of all, it is necessary to clearly determine what they are all like.
Pathogenic microorganisms are a special kind of pathogenic microbes. They penetrate not only into humans, but also perfectly absorbed in the cells and tissues of animals, plants and insects. At the same time, the last two points can only be carriers of infection. Due to its properties, pathogenic microorganisms can even weaken the natural defense of its carrier - its immunity. Due to this, a person becomes susceptible to other diseases. Each individual species of such microbes causes its individual infection. Diseases of this kind can be easily transmitted from one living organism to another. Therefore, they are often called “infectious” in everyday life.
The severity of the disease depends on several factors at the same time:
- pathogenicity, as well as virulence of the microorganism;
- environmental conditions;
- general condition of the microbe.
Let us first deal with the first two concepts. Pathogenic microbes got their name precisely because of the main ability, which is characterized as follows. Each bacterium, depending on its variety, as well as conditions, can cause a specific disease in the body of its carrier. Such an “infection” will be inherent in this particular microbe and no other. This ability is a species trait.
Virulence reflects the degree of pathogenicity of a particular strain of microorganisms. Therefore, it is an individual attribute. However, virulence can be significantly increased if the bacillus passes through several living organisms, alternately infecting them with a disease. In practice, this property can be either enhanced or reduced. However, with proper exposure, there is a chance to eliminate it altogether.
In addition to its basic essence, some pathogenic microorganisms secrete special toxins that adversely affect carrier cells. They contribute to a deeper penetration of the infection, and also enhance the symptoms of its course. In addition, toxins significantly weaken the body's defense, which makes the disease even more dangerous.
In order for a person to become infected with such a "sore", the penetration of a minimum amount of active bacteria will suffice. And the more they get into the body, the faster the first symptoms of the disease appear. The method by which pathogenic microorganisms appeared inside a person is also significant. If open and internal mucous areas (nose, mouth, lungs, etc.) were involved in this process, then, most likely, you will feel the first signs of the disease very soon. But subcutaneous penetration guarantees infection only in the event of a large number of pathogenic “invaders”.
The period during which microbes have already managed to enter the body, but have not yet begun to actively show their activity, is called incubation. It can have a different duration, depending on how active and pathogenic bacteria have penetrated. In addition, the human immune system has already begun to destroy other people's cells. Therefore, if the protective barrier of the body functions well, then the disease itself may not even go beyond the incubation period.