Table 1.
Decision rules related to geographical information for HPAI quarantine zone designation.
| Highly Pathogenic Avian Influenza (HPAI) Farm Culling Criteria | Score | ||
|---|---|---|---|
| Terrain | Mountain range | In cases where there are mountain ranges or terrains with an altitude of 50 m or higher blocking the direct path between the farm under analysis and the nearby farm. | −10 |
| If the farm under analysis is located in the mountains or a mountain is within 100 m proximity. | +3 | ||
| Proportion of river size | When the proportion of national rivers or local rivers within 3 km of the farm under analysis is 3% or higher. | +5 | |
| When the proportion of national rivers or local rivers within 3 km of the farm under analysis is between 2% and 3%. | +2 | ||
| When the proportion of national rivers or local rivers within 3 km of the farm under analysis is between 1% and 2%. | +1 | ||
| When the proportion of national rivers or local rivers within 3 km of the farm under analysis is 1% or less. | −2 | ||