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What is an infectious disease?


An infectious disease is a disease that is not only caused but also supported by the presence of a living damaging foreign agent in the body (the pathogen is responsible for its effects by protective reactions.It must be added that the infectious process in the human body proceeds necessarily in certain environmental conditions, Is manifested at the molecular, subcellular, cellular, tissue, organ and organism levels and naturally ends either in the death of a person or in his complete liberation from the pathogen.
Very harmful to practical medicine is the view that the causative agent only at the beginning plays an active role in pathology, and then the disease develops without his participation. The duration and return of the disease depends primarily on the presence in the human body of the pathogen. Once the body is freed from it, recovery comes.
At present, there is no proof that the vast majority of diseases of a person who is born healthy, in essence, are infectious diseases. In addition, it appears that the leading role of an infectious agent as a damaging factor is also present in many other so-called non-infectious diseases. For example, the "harmful" role of streptococcus is proved as a necessary factor for the development of rheumatism, which leads to the need for antistreptococcal therapy with antibiotics at any stage of the treatment of this disease. A definite role of the infectious agent (in particular, chlamydia) in the development of arteriosclerosis of blood vessels has been justified. In the primary lesion of the vessels, the involvement of a herpetic viral infection is also possible. There are pathogens - helicobacteria, which selectively affect the surface layer of the mucous membrane of the stomach and duodenum, which ultimately leads to chronic gastritis, ulcer of the stomach and duodenum. In this regard, the treatment of antimicrobial drugs in the complex therapy of peptic ulcer becomes a necessity, and the good results of such treatment confirm this position.
The above examples of the infectious nature of various therapeutic diseases once again underscore the need for people who do not have a special medical education to get a broader idea of ​​infectious pathology.