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04-01-2008
Immune reconstitution inflammatory syndrome (IRIS) is an
- Exaggerated inflammatory reaction from a re-invigorated immune system presenting as "unmasking" of previously sub-clinical OIs OR clinical deterioration of pre-existing OIs OR development of autoimmune disease
- Onset: usually within 2-12 weeks after starting ART
- Frequency: 10% among all pts on ART, up to 25% when ART initiated with CD4 <50
- Risk factors: (1) Initiating ART close to Dx of an OI; (2) Initiating ART when CD4 <50; (3) Rapid initial fall in VL in response to ART in patients with low CD4 counts
- Most commonly seen with TB, cryptococcal disease and MAC infection
- Have high index of suspicion with early complications
- Continue ART if possible; if continuation impossible, temporarily interrupt ART and restart same regimen after OI or inflammatory condition treated
- Treat OI or inflammatory condition
- Symptomatic treatment with NSAIDs in patients with milder symptoms
- Corticosteroid treatment in moderate to severe cases: prednisolone or prednisone 0.5 mg/kg/day. Slow taper may be required depending on duration of steroid treatment.
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