An irritant that causes a disease is called pathogenic (Greek “pathos” - disease, “genesis” - origin). Pathogens are pathogens that cause diseases, including bacterial and viral agents. Infectious agents and diseases are written about in dictionaries of infectious diseases or “infections” [1,2].
From the definition it follows that pathogenic microorganisms can cause diseases in any person: infected people, people who have recovered from the disease, or people who do not suffer from diseases. The general manifestation of pathogenic activity is the ability of the pathogen to penetrate into host cells through metabolism (release of biologically active substances), injections or other influences, where it begins to rapidly multiply. The presence of parasites and the diseases they cause continue to have a negative impact on animals and people. By interacting with a healthy cell, a bacterial colony infects it, becoming part of a single biosystem of the body [3]. Examples of pathogenic microorganisms: - pneumococcus Strept