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Q fever diagnostic tests
| Q fever serology/PCR | At presentation | +1 month | +4 months |
| Q fever Ph2 IgG (EIA) | Reactive | Reactive | Reactive |
| Q fever Ph2 IgM (EIA) | Equivocal | Reactive | Reactive |
| Q fever Ph1 IgG (IF) | <10 | 80 | 160 |
| Q fever Ph2 IgG (IF) | 160 | ≥1280 | 640 |
| Q fever Ph2 IgM (IF) | 40 | 640 | 80 |
| Q fever PCR (blood) | Detected | Not Detected | – |
EIA, enzyme immunoassay; IF, immunofluorescence; Ph1, Phase 1; Ph2, Phase 2.
