AIDS defining clinical condition

AIDS defining clinical condition

AIDS defining clinical conditions is the terminology given to a list of diseases published by the United States government run Centers for Disease Control and Prevention (CDC). This list governs the U.S. government classification of HIV disease. This is to allow the government to handle epidemic statistics and define who receives US government assistance. In 1993, the CDC added pulmonary tuberculosis, recurrent pneumonia, and invasive cervical cancer to the list of clinical conditions in the AIDS surveillance case definition published in 1987 and expanded the AIDS surveillance case definition to include all HIV-infected persons with CD4+ T-lymphocyte counts of less than 200 cells/uL or a CD4+ percentage of less than 14. Considerable variation exists in the relative risk of death following different AIDS defining clinical conditions.

According to the US CDC definition, you have AIDS if you are infected with HIV and present with one of the following:

A CD4+ T-cell count below 200 cells/µl (or a CD4+ T-cell percentage of total lymphocytes of less than 14%)


you have one of the following defining illnesses:

*Candidiasis of bronchi, trachea, or lungs
*Candidiasis esophageal
*Cervical cancer (invasive)
*Coccidioidomycosis, disseminated or extrapulmonary
*Cryptococcosis, extrapulmonary
*Cryptosporidiosis, chronic intestinal for longer than 1 month
*Cytomegalovirus disease (other than liver, spleen or lymph nodes
*Encephalopathy (HIV-related)
*Herpes simplex: chronic ulcer(s) (for more than 1 month); or bronchitis, pneumonitis, or esophagitis
*Histoplasmosis, disseminated or extrapulmonary
*Isosporiasis, chronic intestinal (for more than 1 month)
*Kaposi's sarcoma
*Lymphoma Burkitt's, immunoblastic or primary brain
*Mycobacterium avium complex
*Mycobacterium, other species, disseminated or extrapulmonary
*Pneumocystis jiroveci pneumonia (formerly Pneumocystis carinii)
*Pneumonia (recurrent)
*Progressive multifocal leukoencephalopathy
*Salmonella septicemia (recurrent)
*Toxoplasmosis of the brain
*Wasting syndrome due to HIV

People who are not infected with HIV may also develop these conditions; this does not mean they have AIDS. However, when an individual presents laboratory evidence against HIV infection, a diagnosis of AIDS is ruled out unless the patient has not:

undergone high-dose corticoid therapy or other immunosuppressive/cytotoxic therapy in the three months before the onset of the indicator disease OR been diagnosed with Hodgkin's disease, non-Hodgkin's lymphoma, lymphocytic leukemia, multiple myeloma, or any cancer of lymphoreticular or histiocytic tissue, or angioimmunoblastic lymphoadenopathy OR a genetic immunodeficiency syndrome atypical of HIV infection, such as one involving hypogamma globulinemia


the individual has had "Pneumocystis jiroveci" pneumonia OR one of the above defining illnesses AND a CD4+ T-cell count below 200 cells/µl (or a CD4+ T-cell percentage of total lymphocytes of less than 14%).


*CDC. Revision of the CDC surveillance case definition for acquired immunodeficiency syndrome. MMWR 1987;36:1-15S.
*CDC. [ 1993 Revised Classification System for HIV Infection and Expanded Surveillance Case Definition for AIDS Among Adolescents and Adults]
* [ AIDS info]
* [ Disease progression and survival following specific AIDS-defining conditions: a retrospective cohort study of 2048 HIV-infected persons in London.]

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