The co-occurrence of acute rheumatic fever and AIDS.

We describe a patient with advanced acquired immunodeficiency syndrome (AIDS) who presented with evidence of carditis, arthritis, and chorea in the setting of fever, and serologic evidence for recent streptococcal infection. Several features atypical for rheumatic fever were present and included persistently high titer of antistreptolysin O, the simultaneous occurrence of chorea and arthritis, and the presence of chorea in a sexually mature adult man. The differential diagnosis of arthritis in a host at risk for human immunodeficiency virus should be expanded to include acute rheumatic fever, which may manifest atypical features.