Acquired Immunodeficiency Syndrome (AIDS)

B: (Kimia) sindrom imunodefisiensi perolehan; AIDS
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[病稱] 後天免疫不全徵候群; 愛茲病.

Sindrome da immunodeficenza acquisita (AIDS)

A disease of the body's immune system caused by the human immunodeficiency virus (HIV). AIDS is characterized by the death of CD4 cells (an important part of the body's immune system), which leaves the body vulnerable to life-threatening conditions such as infections and cancers.
See Also: AIDS-Defining Condition, Human Immunodeficiency Virus, Opportunistic Infections, AIDS-Related Cancer
  

The most severe manifestation of infection with the Human Immunodeficiency Virus (HIV). The Centers for Disease Control and Prevention (CDC)<!-- (see) --> lists numerous opportunistic infections and neoplasms (cancers) that, in the presence of HIV infection, constitute an AIDS diagnosis. There are also instances of presumptive diagnoses when a person's HIV status is unknown or not sought. This was especially true before 1985 when there was no HIV-antibody test. In 1993, CDC expanded the criteria for an AIDS diagnosis to include CD4+<!-- (see) --> T-cell count at or below 200 cells per microliter in the presence of HIV infection. In persons (age 5 and older) with normally functioning immune systems, CD4+ T-cell counts usually range from 500-1,500 cells per microliter. Persons living with AIDS often have infections of the lungs, brain, eyes, and other organs, and frequently suffer debilitating weight loss, diarrhea<!-- (see) -->, and a type of cancer called Kaposi's Sarcoma<!-- (see) -->. See HIV Disease; Opportunistic Infection; AIDS Wasting Syndrome.