Table 3 PRRSV positivity rates in serum and oropharyngeal swab samples from sows under field condition
Sample type | Tested farm | Positive farm※ | Positivity rate at the farm level | Tested sample | Positive sample | Positivity rate at the sample level |
|---|---|---|---|---|---|---|
Serum | 50 | 32 | 64% CI 50.2%–77.8% | 6259 | 255 | 4.1%a CI 3.6%–4.6% |
Oropharyngeal swabs | 50 | 49 | 98% CI 94.0%–100.0% | 24,718 | 2324 | 9.4%b CI 9.0%–9.8% |