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Diagnosis of chikungunya infection and arthritis
| Phase | Modality |
|---|---|
| Acute phase (<3 months) | Viral PCR (0–5 days) |
| IgM CHIKV (day 7 till 2–3 months) | |
| IgG CHIKV (day 7 onward) | |
| Chronic phase (>3 months) | IgG CHIKV |
| RF, anti CCP, HLA B27 (if indicated) |
Anti-CCP = anti-citrullinated peptide antibody; CHIKV = chikungunya virus; HLA = human leukocyte antigen; IgG = immunoglobulin G; IgM = immunoglobulin M; PCR = polymerase chain reaction; RF = rheumatoid factor.
