Clinical stage I
Asymptomatic.
Generalized lymphadenopathy.
Clinical stage II
Chronic diarrhea >30 days duration in absence of known etiology.
Severe persistent or recurrent candidiasis outside the neonatal period.
Weight loss or failure to thrive in the absence of known etiology.
Persistent fever >30 days duration in the absence of known etiology.
Recurrent severe bacterial infections other than septicemia or meningitis.
Clinical stage III
AIDS-defining opportunistic infections.
Severe failure to thrive (wasting) in the absence of known etiology.
Progressive encephalopathy.
Malignancy.
Recurrent septicemia or meningitis.