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Number of positive samples of N-PCR collected from 8 finishing pigs using five DNA extraction methods, two types of sample transport media, and two types of swabs.
| Media | FRIIS | Saline | ||
| Swab Extraction method | Tonsil | Nasal | Tonsil | Nasal |
| BOOM | 3 | 4 | 6 | 7 |
| FAN | 7 | 3 | 5 | 2 |
| CBIOT | 6 | 3 | 3 | 4 |
| CALSAMIGLIA** | 2 | 1 | 3 | 2 |
| SAMBROOK** | 2 | 0 | 1 | 0 |
| Total | 20 | 11 | 18 | 15 |
Tonsil; N: Nasal;
only five pigs were used.
