Factors | n | Influenza A virus | χ 2 | P-value | |
---|---|---|---|---|---|
Negative (%) | Positive (%) | ||||
Polyculture of flocks from various sources | |||||
 No | 229 | 221 (96.51) | 8 (3.49) | – | 0.77a |
 Yes | 123 | 118 (95.93) | 5 (4.07) |  |  |
Types of live poultry | Â | Â | Â | Â | Â |
 1 | 195 | 191 (97.95) | 4 (2.05) | 6.170 | 0.013b |
 2 | 135 | 129 (95.56) | 6 (4.44) |  |  |
 3 | 22 | 19 (86.36) | 3 (13.64) |  |  |
Number of live poultry | |||||
  ≤ 19 | 230 | 225 (97.83) | 5 (2.14) | – | 0.07a |
  ≥ 20 | 122 | 114 (93.44) | 8 (6.56) |  |  |
Type of nesting area | |||||
 Enclosed | 127 | 121 (95.28) | 6 (4.72) | 0.305 | 0.581 |
 Open | 200 | 193 (96.50) | 7 (3.50) |  |  |
Nesting area(m2) | |||||
  ≤ 19 | 161 | 154 (96.65) | 7 (4.35) | 0.604 | 0.437b |
 20–49 | 105 | 101 (96.19) | 4 (3.81) |  |  |
  ≥ 50 | 86 | 84 (97.67) | 2 (2.33) |  |  |
Type of raising | |||||
 Free ranging | 200 | 194 (97.00) | 6 (3.00) | 1.284 | 0.257 |
 In captivity | 127 | 120 (94.49) | 7 (5.51) |  |  |
Clean practice of premises | |||||
 No | 241 | 229 (95.02) | 12 (4.98) | – | 0.197a |
 Yes | 82 | 81 (98.78) | 1 (1.22) |  |  |
Disinfection practice of premises | |||||
 No | 291 | 279 (95.88) | 12 (4.12) | – | 1.000a |
 Yes | 22 | 32 (9.88) | 1 (3.03) |  |  |
Sanitary condition of premises | |||||
 Poor | 131 | 121 (92.37) | 10 (7.63) | 7.407 | 0.006b |
 Average | 189 | 186 (98.41) | 3 (1.59) |  |  |
 Good | 8 | 8 (100) | 0 (0.00) |  |  |
Flocks vaccination history | |||||
 Yes | 65 | 64 (98.46) | 1 (1.54) | – | 0.477a |
 No | 261 | 249 (95.40) | 12 (4.60) |  |  |
Human infection(H7N9) identified nearby | |||||
 Yes | 46 | 43 (93.48) | 3 (6.52) | – | 0.405a |
 No | 281 | 271 (96.44) | 10 (3.56) |  |  |
Sick or dead flock | |||||
 Yes | 341 | 329 (96.48) | 12 (3.52) | – | 0.236a |
 No | 7 | 6 (85.71) | 1 (14.29) |  |  |
Poultry source | |||||
 From market | 280 | 268 (95.71) | 12 (4.29) | – | 0.481a |
 Not from market | 72 | 71 (98.61) | 1 (1.39) |  |  |