Table 2 Prevalence of avian influenza virus in different types of samples from field survey
Types | Sum | Prevalence (%) | ||||
|---|---|---|---|---|---|---|
A | H5 | H7 | H9 | H5/H7/H9 | ||
Poultry samples | 16 10 | 21 (1.30) | 0 (0) | 0 (0) | 0 (0) | 0 (0) |
 Feces | 16 10 | 21 (1.30) | 0 (0) | 0 (0) | 0 (0) | 0 (0) |
Environment samples | 1561 | 31 (1.99) | 0 (0) | 0 (0) | 4 (0.26) | 4 (0.26) |
 Cage swabs | 585 | 7 (1.20) | 0 (0) | 0 (0) | 3 (0.51) | 3 (0.51) |
 Drinking water samples | 519 | 9 (1.73) | 0 (0) | 0 (0) | 0 (0) | 0 (0) |
 Sewage samples | 82 | 0 (0) | 0 (0) | 0 (0) | 0 (0) | 0 (0) |
 Crib swabs | 294 | 13 (4.42) | 0 (0) | 0 (0) | 0 (0) | 0 (0) |
 Environmental surface swabs | 81 | 2 (2.47) | 0 (0) | 0 (0) | 1 (1.23) | 1 (1.23) |
  Total | 3171 | 52 (1.64) | 0 (0) | 0 (0) | 4 (0.13) | 4 (0.13) |
  χ2 | – | 2.2825 | – | – | – | – |
  P-value | – | 0.1308 | – | – | – | – |