Predictors of clinical AIDS in young homosexual men in a high-risk area.
One hundred and sixty-seven homosexual men in Los Angeles characterized by HIV antibody, T-cell numbers, titres to cytomegalovirus (CMV), and specific sexual practices were followed for two years for immune changes and for more than three years for development of clinical AIDS. Thirty-five per cent had antibody to HIV at baseline. The mean level of T-helper (Th) cells was significantly lower and of T-suppressor (Ts) cells significantly higher in HIV seropositives than in seronegatives. The annualized incidence of HIV seroconversion was 7%. Eight men developed AIDS, an attack rate of 14% in those with HIV antibody at baseline. A number of observations were made: T-cell alterations, except a transient elevation in Ts cells, were unusual in the absence of HIV antibody; a seropositive man with a T-cell alteration was significantly less likely to revert to 'within normal limits' than was a seronegative man; a steady decline in the number of Th cells preceded onset of clinical AIDS; the number of Ts cells remained higher in men subsequently developing AIDS than in other seropositive men; clinical AIDS occurred only in men with HIV antibody whose CMV antibody levels were above the median for the group (1:1600); and the attack rate for clinical AIDS was 50% in men with HIV antibody and elevated CMV who at baseline had either: fewer than 325 Th cells/cc, or whose Th/Ts ratio was below 0.8 (but whose levels of Th and Ts cells were within normal limits).(ABSTRACT TRUNCATED AT 250 WORDS)
D000163:Acquired Immunodeficiency Syndrome / Q000276:immunology*; D000328:Adult; D000914:Antibodies, Viral / Q000032:analysis*; D003587:Cytomegalovirus / Q000276:immunology; D006678:HIV / Q000276:immunology; D006716:Homosexuality; D006801:Humans; D007074:Immunoglobulin G / Q000032:analysis; D007075:Immunoglobulin M / Q000032:analysis; D008297:Male; D012306:Risk; D013601:T-Lymphocytes / Q000276:immunology*
D000914:Antibodies, Viral; D007074:Immunoglobulin G; D007075:Immunoglobulin M