Infectious diseases caused by microbes . These are small organisms that are invisible to the naked eye , and " burst " in the body , in order to reproduce . The symptoms caused by the infection will depend on the location , the nature of the infection and the type of microbe .
The two main types of microbes are bacteria and viruses. Viruses are the smallest size of all germs. They can " attack " almost every living organism . Viruses used for the host of other organisms , such as man. This means that the virus invades a cell in the body and parts thereof used in order to reproduce .
Thus produced hundreds of new viruses which can spread throughout the body. They can also infect new organisms. Viruses can not survive outside the host organism for long. Can live for several seconds to a few minutes after you leave .
Bacteria are much larger size of viruses. They live almost everywhere , and many of them do not cause infections. Bacteria reproduce by division. If conditions are favorable - temperature, nutrient availability - some species can reproduce every 20 minutes.
Intestines contain a large number of bacteria. Usually they do not cause problems. In many cases even useful - for example, there are bacteria that aid digestion. However , if the immune system is weak , may occur problems such as diarrhea , constipation or cramping.
Viruses and bacteria can cause infection. Local infection leads to redness and swelling . The fabric may also become warm and painful. Typical symptoms of a viral or bacterial infection include fever , fatigue and weakness . Overall, the viral infection is simple and complaints subside on its own.
It is difficult to destroy viruses. Specific medications have been developed that are aimed at specific types .
Bacterial infections also usually resolves on its own. If this is not the case, your doctor may prescribe antibiotics.
It is important to prevent the spread of germs. For this purpose good hygiene plays an important role .