Medical Encyclopedia

Viral infections

What is a virus?

Viruses are the most primitive form of life, the smallest infectious agents. They are smaller than bacteria and reproduce only in living cells of the owner. Having entered into the body's cells, viruses are transmitted to her genetic information and "forced" to produce new viruses. Typically, virus infection occurs when they get on the mucosa. Some viruses can be transmitted only if they get directly into the bloodstream. Viruses can be grouped into excited disease, geographic regions in which they cause disease, the area in which were first discovered.

Vaccination against viral infections

In order to prevent some viral diseases doctors perform active immunization:

  • Hepatitis B.
  • Rabies.
  • Flu.
  • Tick-borne encephalitis.
  • Yellow fever.
  • Measles.
  • Mumps
  • Rubella.

What diseases are caused by viruses?

The main feature of viruses is their peculiar structure. They have a family history, which is caused by the same structure as that of other living organisms - nucleic acids. Most viral diseases are acute respiratory viral infections and intestinal catarrh.

There are viruses affecting the nervous system and, for example, viruses, polio, rabies, tick-borne encephalitis. Some viruses contribute to the development of skin diseases such as pemphigus, education warts, damage to internal organs such as the liver in viral hepatitis, blood vessel walls. AIDS, rabies and smallpox almost disappeared also refer to viral diseases.

Treatment of viral infections

Viral infections

Eliminate the virus is almost impossible, so it is often taken steps to mitigate the symptoms of the disease or strengthen immunity. If rotavirus diarrhea is accompanied by vomiting and diarrhea, it is quite possible that this is not a viral infection, and any other disease.

Antibiotics are powerless against viruses. One way of protection against viruses is vaccination - administering a weakened pathogens, to inactivate the immune system starts to produce antibodies. In passive immunization introduced antibodies obtained from the blood of humans or animals.

Course of the disease

The incubation period - from several days to several years. Because the body's immune system is able to recognize most of the viruses already once defeated, people develop lifelong immunity to the respective pathogens. With flu situation is different. His viruses mutate acquiring new properties, and thus "overreach" human immune system.

Prevention of viral infections

Hardening is the only way to protect against virus infection. It is best to use the sauna, outdoor exercise and proper nutrition.

Active and passive immunization is used along with hygienic measures, such as insulation (in fact, if the disease is contagious).

Other articles:

Rabies

Bacterial infections