Table 7.
Enrichment factor of the airfuge concentration procedure
| Concentration (part per ml) | Airfuge* | Drop‐on‐grid* | Enrichment factor |
|---|---|---|---|
| Spores | |||
| 107 | 459 | 28 | 16 |
| 106 | 56 | 11 | 5 |
| 105 | 8 | 1 | 8 |
| Virus | |||
| 106 | 340 | 3 | 113 |
| 105 | 34 | 1 | 34 |
*numbers in particles/22 grid squares.
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