HIV, how it works?

HIV, HIV, AIDS sometimes difficult to navigate and really understand what is happening in the body, how the disease occurs and what are the symptoms.
The real name of the virus is HIV, for human immunodeficiency virus (HIV English). It is he who is responsible for the disease. It is not contagious, that is to say, it can not simply catch outdoors, talking with an infected person. However, it is transmissible in some case, if you find yourself in contact with blood or sexual fluids of an infected person.HIV is particularly dangerous because it attacks our immune system. In fact, its structure allows it to infect and destroy certain white blood cells, the CD4 cells. It has on the membrane that surrounds a protein that serves as a key to be introduced into the cell. With all the elements present inside the white blood cell, HIV can reproduce more than once. Thus the virus multiple rapidly.
Opportunistic diseasesWe talk about HIV status when did an HIV test and we found HIV antibodies in the blood: that means that our organization has been in contact with the virus and attempted to fight it. In vain, in the case of HIV, since once it is installed, no, for now, has been able to dislodge him.If it is not detected and continues to proliferate, HIV will eventually bring down the rate of CD4 cells in the blood. Normally, in a healthy individual, this rate should be above 500 T4 lymphocytes / mm3 in the blood. When levels drop, the body is exposed to all kinds of virus against which it can no longer fight. Below LT4 200 / mm3, multiple infections begin to grow: it is the opportunistic diseases that take advantage of the weakness of the organization to introduce and develop. This is when we talk about AIDS, once the disease was reported. AIDS is the acronym for Acquired Immunodeficiency Syndrome.These opportunistic infections, the most common are:

 Pneumocystis pneumonia, which attacks the lungs. It is due to a microorganism that commonly circulates in the population. But against that AIDS patients can not fight. Symptoms include a dry cough, high fever and deterioration of general condition.
 Cerebral toxoplasmosis: these brain abscess. Symptoms vary depending on where it is located: blindness, hemiplegia, etc.
 Cytomegalovirus: its symptoms can be similar to those of mononucleosis. The patient experiences severe fatigue, is feverish, has important muscle pain, headaches up meningitis ...
 Kaposi's sarcoma, the famous brown spots on the skin, now so closely associated with AIDS. Sometimes Kaposi's sarcoma also attacks the lungs with much more serious consequences.