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Table 1 Surveillance results of environmental AIVs in Fujian Province, during 2013–2017
| Influenza A virus | H5 subtype | |||||||
|---|---|---|---|---|---|---|---|---|
| Number of samples | Number of positive (%) | P-value | χ 2 | Number of positive (%) | P-value | χ 2 | ||
| Surveillance city | Fuzhou | 819 | 157 (19.17) | <0.001 | 540.835 | 7 (0.85) | <0.001 | 101.033 |
| Xiamen | 1060 | 594 (56.04) | 63 (5.94) | |||||
| Quanzhou | 1234 | 369 (29.90) | 51 (4.13) | |||||
| Zhangzhou | 589 | 33 (5.60) | 1 (0.17) | |||||
| Sanming | 600 | 219 (36.50) | 59 (9.83) | |||||
| Nanping | 601 | 193 (32.11) | 27 (4.49) | |||||
| Sample site | LPMs | 3785 | 1500 (39.63) | <0.001* | 199 (5.26) | <0.001* | ||
| Poultry farms | 275 | 1 (0.36) | 0 (0.00) | |||||
| Poultry households | 701 | 48 (6.85) | 4 (0.57) | |||||
| Poultry slaughter factories | 133 | 16 (12.03) | 5 (3.76) | |||||
| Others | 9 | 0 (0.00) | 0 (0.00) | |||||
| Sample | Fresh fecal | 1696 | 477 (28.13) | <0.001* | 55 (3.24) | <0.001* | ||
| Cage surface | 1245 | 401 (32.21) | 35 (2.81) | |||||
| Poultry drinking water | 788 | 252 (31.98) | 39 (4.95) | |||||
| Cleaning poultry sewage | 635 | 249 (39.21) | 38 (5.98) | |||||
| Poultry chopping board surface | 535 | 184 (34.39) | 41 (7.66) | |||||
| Others | 4 | 2 (50.00) | 0 (0.00) | |||||
| Season | Spring | 1448 | 555 (38.33) | <0.001 | 90.916 | 78 (5.39) | <0.001 | 48.174 |
| Summer | 1060 | 284 (26.79) | 20 (1.89) | |||||
| Autumn | 975 | 218 (22.36) | 19 (1.95) | |||||
| Winter | 1420 | 508 (35.77) | 91 (6.41) | |||||
| Total | 4903 | 1565 (31.92) | 208 (4.24) | |||||
