An acquired defect of cellular immunity associated with infection by the human immunodeficiency virus (HIV), a CD4-positive T-lymphocyte count under 200 cells/microliter or less than 14% of total lymphocytes, and increased susceptibility to opportunistic infections and malignant neoplasms. Clinical manifestations also include emaciation (wasting) and dementia. These elements reflect criteria for AIDS as defined by the CDC in 1993.

Synonyms: Syndrome, Acquired Immunodeficiency, Immuno-Deficiency Syndromes, Acquired, Acquired Immuno Deficiency Syndrome, Syndrome, Acquired Immuno-Deficiency, Acquired Immuno-Deficiency Syndrome, Immunodeficiency Syndromes, Acquired, Acquired Immuno-Deficiency Syndromes, Immuno-Deficiency Syndrome, Acquired, Immunologic Deficiency Syndrome, Acquired, Acquired Immunodeficiency Syndromes, AIDS, Syndromes, Acquired Immuno-Deficiency, Acquired Immune Deficiency Syndrome, Immunodeficiency Syndrome, Acquired, Syndromes, Acquired Immunodeficiency, Acquired Immunodeficiency Syndrome