Table 4. Comparison of detection results between rRT-PCR and HI test.
| HI conversion | |||
| Field | rRT-PCR | Positive | Negative |
| Shandong | Positive | 22 | 26 |
| Negative | 44 | 0 | |
| Guizhou | Positive | 28 | 21 |
| Negative | 19 | 0 | |
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