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AFRICA HEALTH. 1992 Jul; 14(5):10-1.An update on clinical aspects of HIV in africa highlights new proposed clinical definitions of adult AIDS and of tuberculosis in HIV+ adults, and staging of adult HIV infection. The 1986 WHO clinical definition of AIDS has been widely used in Africa, but now research suggests that this definition has several limitations: the definition will pick up several unrelated diseases such as diabetes mellitus and renal failure. It does not ascertain cases of AIDS marked by nonopportunistic infections. Most persons with pulmonary tuberculosis may be wrongly diagnosed with AIDS by this definition. The study showed that the WHO clinical definition has good specificity and positive predictive value for HIV+ people, but its positive predictive value fell to 30% in identifying people with AIDS in Africa. New definitions should take into account any serious morbidity, tuberculosis, neurological disease, both endemic localized Kaposi's, and aggressive typical Kaposi's sarcoma, and HIV serological testing. Tuberculosis is a problem because few HIV+ people suspected of having pulmonary TB (sputum-negative TB) actually have it based on bronchoscopy, while HIV+ persons with TB experience high mortality, often from pyogenic bacteremia. HIV+ persons with TB suffer high rates of relapse, possibly related to insufficient drug treatment or reinfection. 1 study showed that 6 months of isoniazid significantly improved incidence of TB over 30 months of follow-up. Staging of AIDS in Africa based on degree of immunosuppression was proposed as: 1) clinically inapparent HIV infection marked by pulmonary TB, soft tissue infections, and community acquired pneumonia; 2) lymphadenopathy, oral thrush, widespread pruritic maculopapular rash, herpes zoster, enteric illness, dysentery, and Kaposi's sarcoma; and 3) HIV wasting syndrome, chronic pulmonary disease, meningitis, and fever of unknown origin.