Table 2.
Laboratory measurements, equipment, and normal range
| Test | Test equipment | Company | Quality control | Normal range |
|---|---|---|---|---|
| Hs-CRP | Biochemical auto analyzer | Pars azmoon |
Intra-assay CV: 2.2% Inter-assay CV: 1.1% Linearity (R2): 0.99 Detection limit: 0.1 mg/lit |
Children: up 2.8 mg/L Adult: up to 5 mg/L |
| IL-6 | ELISA kit | Demeditec |
Intra assay CV: 4.2% Inter assay CV: 4.9% Accuracy: 99% Specificity: 94% Detection limit: 2 pg/ml |
Up to 1.8 pg/ml |
| IL-10 | ELISA kit | pars gene (Invitrogen) |
Intra assay CV < 3% Inter assay CV < 8% Detection limit:2 pg/ml |
1.2–7.8 pg/ml |
| Calprotectin | ELISA kit | EUROIMMUN |
Intra assay CV: 3.4% Inter assay CV: 6.4% Linearity(R2): 0.99 Sensitivity: 94.1% Specificity: 95.5% Detection limit:1.9 μg/g |
50–120 μg/g: borderline > 120 μg/g: positive |
| Nasopharyngeal swab | URT-S&C (gram-positive, gram negative, pseudomonas) | Variable | Culture: negative WBC count: up to 2–3 |