Table 4.
Evaluation of the clinical samples (positive/total) (percentage).
| Source | Tissue | Environmental Swab | Whole Blood | Nasopharyngeal Swab | Total |
|---|---|---|---|---|---|
| Pig farm | / | 2/107 (1.87%) c | 11/1134 (0.97%) | 3/37 (8.11%) | 15/1278 (1.25%) d |
| Slaughterhouse | 58/480 (12.08%) b | 214/752 (28.46%) a | / | / | 330/1908 (17.30%) b |
| Farmer’s market | 14/175 (8.00%) b | 53/451 (11.75%) b | / | / | 67/626 (10.70%) c |
| Harmless disposal site | 105/365 (28.77%) a | 16/62 (25.81%) a | / | / | 121/427 (28.34%) a |
| Total | 177/1020 (17.35%) B | 285/1372 (20.77%) A | 11/1134 (0.97%) D | 3/37 (8.11%) C | 534/4239 (12.60%) |
Note: The data in the same column which are marked with different small letters indicate significant differences (p < 0.05). The data in the last line which are marked with different capital letters indicate significant differences (p < 0.05). The harmless disposal site is the place where dead pigs are concentrated from one or more different pig farms for harmless treatment.