Sources of fever vary by stage of disease.   The CD4 count of < 200 × 106 cells/μL is very likely if the ED absolute lymphocyte count is < 950 × 10(6) cells/μL and less likely if the absolute lymphocyte count is > 1,700 × 106 cells/μL
Work-up similarly to nonimmunocompromised patients
Early bacterial respiratory infection most common
PCP, central line infection, MAC, TB, CMV, drug fever, sinusitis
Also consider: endocarditis, lymphoma, histo, crypto
Consider disseminated MAC
Toxoplasmosis (CNS or pulmonary)
AIDS fever of unknown origin
HIV neurologic complications
Pediatric fever of uncertain source
Toxoplasmosis
Lemierre's syndrome
Cryptococcosis
Drug fever
AIDS Dementia