What is the history of the discovery of viruses

The very concept of "virus" poison, something that deserves special attention from humanity. Viruses are built from a special genetic material, able to penetrate and parasitize in a living cell, setting up its work on the reproduction of the malicious component.

Living poisons - the story of discovery


For the first time, viruses as pathogens of dangerous diseases were discovered by the famous Russian biologist Dmitry Iosifovich Ivanovsky more than two hundred years ago as a result of studying the disease that destroys the leaves of a plant like tobacco.
The absence of the main signs of vital activity of bacteria and special experiments related to filtration, which did not bring positive results, prompted the scientist to the idea of ​​the existence of another pathogen that is not associated with bacteria that were already sufficiently studied at the time of 1892. The new discovery had the working name “filtering bacteria,” in fact, it was a completely new, hitherto unknown form of life, consisting of a small number of enzymes it needed and parasitizing at the expense of the host's energy and nutrients.

Parasite gourmet


In the process of further study of the new phenomenon, the exact dimensions and composition of viruses were determined, it turned out that they were based on nucleic acids, they had the properties to transmit hereditary information and mutate, adapting to environmental changes. This explains the different symptoms and types of lesions of various animals and plants caused by the same viral disease.Due to inertia, viruses can be considered living molecules that can come to life only when they are ingested by a living cell.
Viruses are quite selective, have a certain range of hosts and preferred habitat.

Bacteriophages


Almost a quarter of a century after the grand discovery in Canada, the so-called bacteriophages, viruses that infect bacteria, were studied and promulgated, which formed the basis of many methods of dealing with bacterial diseases.
At the beginning of the 20th century, another surprising discovery was made concerning the vital activity of viruses. The ability of viruses to cause cancer, affecting and destroying the structure of healthy cells of the body.Currently, the majority of viruses are structured and classified according to the structure, properties and habitat, retroviruses, adenoviruses, herpes viruses have been isolated.
In 1981, a deadly disease such as AIDS caused by the immunodeficiency virus was discovered and promulgated.
Modern medicine has learned to successfully fight, prevent and alleviate the symptoms of viral diseases.


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