Infectious diseases

Differences between viral and bacterial infections

Know the differences between viral and bacterial infections is necessary due to the fact that these infections are treated differently.The treatment of bacterial infections with antibiotics is carried out.Viral infection is not treatable with antibiotics, since they do not act on them.If antibiotics are used in the absence of relevant indications, it may be formed of resistant bacteria.In addition, antibiotics often cause side effects, including development of violations of quantitative and qualitative composition of microflora.

The different bacteria from viruses

Bacteria are microorganisms, usually unicellular having unformed core, and the structure is more simple when compared to the cells of plants and animals.Bacterial cells may be round, rod-shaped.Less can find other forms of bacteria.Many bacteria are normally harmless to humans and living on his skin, in the gut mucosa with the general weakening of the body or impaired immunity, may be pathogenic.
Under viruses are understood compounds of
protein and nucleic acid.Unlike bacteria they are parasites incapable of reproduction outside the cell.Bacteria enter the cell, whereupon it is forced to make copies of the virus.In case of infection in the cell is activated special mechanisms of protection from viruses.Infected cells produced interferon starts coming into contact with the neighboring healthy cells and transforms them into an antiviral state.In addition, they against viruses to stimulate the immune system.
Certain viruses can remain in the body throughout life.In this case they are dormant and activated only in the presence of certain conditions.Among these viruses can be identified papillomaviruses, herpesviruses and HIV.The virus is in a latent state, is not capable of either destroy the immune system, or drugs.

symptoms of viral infection

for viral infections characterized by the sudden onset of a bright, 1-2 days before the clinical period.Symptoms of infection include viral prodrome 1-2 days with the presence of signs of intoxication in the absence of explicit lesion.The disease is accompanied by fever, headache, fever, chills, weakness, cough and sore throat.

Symptoms of bacterial infection

development of bacterial infection happens very slowly and for a long time.It is very difficult to identify the point at which infection occurred.The symptoms of bacterial infection is the appearance of not very high temperatures, there is a distinct lesion.Bacterial infections appear purulent (usually yellow or yellow-zelevatye) allocation.If a viral infection was not attached bacterial flora, then watery secretions (serous) or a slimy character.
penetration of bacterial infection may occur primarily or to be attached to a viral infection, because the virus is suppressed immunity.For example, the occurrence of primary influenza pneumonia occurs on 1-2 th day of flu, while characterized by the appearance of dry cough at the beginning, and from the 3rd day - the allocation of the bloody sputum in large quantities.Joining the flu metagrippal secondary (bacterial) pneumonia occurs after 6 days or more is allocated purulent sputum.
In the case of flu high fever lasts more than 5 days.If it is no reduction, it is associated with the beginning complication (pneumonia, sinusitis, bronchitis, otitis, myocarditis), or that the disease was not initially influenza.
pus always says that in the body there is a bacterial or mixed (bacterial and viral) infection, but, however, the converse assertion is erroneous.In addition to virus, there are a number of bacterial infections that are not characterized by the formation of pus.For example, to such infections include SARS.