Human Viruses

Viruses are non-cellular organisms, representing the minimal form of existence of life. Their constituents serve as those necessary elements that enable parasitic existence and further reproduction. The size of the viruses is very small. They are in the range of several tens to thousands of nanometers.

Viruses are classified as a category of cellular parasites. Their main feature is the ability to reproduce and exist only under certain conditions. The necessary resources for functioning, they can be obtained only from the host cell, which is considered a cell, affected by the virus. Being in an environment outside the body, the particles of parasites have the ability only to preserve and transfer the genetic information embedded in them. The form of the extracellular virus is called the virion.

Parasitic particles can exist in all living organisms. Human viruses can cause a large number of ailments, which are extremely dangerous for its existence. Among such diseases can be called avian influenza and AIDS, natural (black) smallpox and atypical form of pneumonia. The same common ailments include the common cold for us, as well as the flu and rubella. Some viruses of animals known to affect the human body are also known. Such an ability they have when certain conditions exist. An example of this can be the H5N1 virus of bird flu.

In nature, there is a huge number of parasitic forms of existence of life. For greater convenience of their study, various types of classification systems have been developed. The most widely used is the totality of two of them: ICTV and Baltimore.

The virus structure is a thread from the nucleotide chain. These substances are the main elements in the composition of the nucleic acid.

Human viruses, the types of which are distinguished by their structure, can be:

- Neurotropic (various viral encephalitis and rabies);

- dermatropic (smallpox and foot and mouth disease);

- pneumotrophic (influenza);

- viscerotropic (pig plague).

The category of the virus also includes various pathogens, which are classified as a transition group from the minimal form to the bacterium. Rickettsia belong to this group . These microorganisms are rod-shaped, globular or clavate, similar in structure to bacteria, and in the manner of reproduction with viruses, since their vital activity is possible only within host cells. Rickettsia causes Marseillian fever, as well as flea or rat typhus.

Human viruses belonging to the next group are chlamydia or pararikkettsii. These pathogens are close in their structure to bacteria and therefore they can be eliminated with the help of antibiotics.

The most well-known diseases that are caused by viruses are ARVI. Now there are more than three hundred subtypes belonging to the five groups of the parasitic form that provoke the onset of the disease. These include human viruses that trigger the onset of influenza and parainfluenza. And also rheo- and renoparasitic forms.

Human viruses that cause a benign tumor are referred to the genus papillomaviruses. They provoke the growth of neoplasms, similar in appearance to warts. Papillomas appear both on the skin integuments, and on the mucous membranes of the oral cavity, pharynx, and nasal sinuses. Benign tumors can appear on the vocal cords and even in the bladder. Treatment of human papilloma requires prior consultation with a specialist. When a neoplasm occurs, it is necessary to urgently consult a dermatologist. The cause of papillomas is a violation of the health of the body. Basically, the appearance of neoplasms is promoted by gastritis and kidney disease, neglected colitis, as well as gynecological and some other ailments.