AIDS acquired immune deficiency syndrome ( acquired immunodeficiency syndrome, AIDS ). It is a chronic and fatal infectious disease, human immunodeficiency virus ( human immunodeficiency virus, HIV ) induced by. After HIV infection leading to human immune function defects, thus the occurrence of opportunistic infections and a series of clinical syndrome, mortality rate is almost 100% HIV belongs to the Retroviridae, lentivirus, primate immunodeficiency subgenus. It has been proved that HIV is divided into two types: type HIV-1and type HIV-2, they also have their own subtype. Regional differences in the prevalence of various subtypes, the same subtypes in different regions also is put in certain difference.
The pathogenesis of AIDS
The HIV virus is a virus to kill cells, the virus is mainly in the ‘ T helper lymphocytes proliferation of the cells within the ‘ destruction. And ‘ helper T lymphocytes ‘ body is extremely important in the immune cells, its destruction, gradually lead to immune failure. In this way, even a normal person is not worth mentioning the infection, such as small wound or the common cold, also can cause AIDS.