Table 3.
Comparison of median external and internal biosecurity scores of broiler farms in Central Luzon.
| Biosecurity category | Province |
Kruskal-Wallis P value1 | ||||||
|---|---|---|---|---|---|---|---|---|
| Aurora (n = 2) | Bataan (n = 56) | Bulacan (n = 54) | Nueva Ecija (n = 131) | Pampanga (n = 77) | Tarlac (n = 52) | Zambales (n = 54) | ||
| External biosecurity | ||||||||
| Purchase of day-old chicks | 90.0 | 79.0c | 79.0e | 79.0a | 79.0a,d | 79.0b,c,d,e | 79.0b | 0.024 |
| Transport of live animals | 59.0 | 60.0a,b,c,e | 53.0a,f | 53.0d,e,i | 61.0f,g,h,i | 52.5c,d,h | 50.0b,g | <0.001 |
| Feed and water supply | 39.0 | 77.0 | 67.0 | 77.0 | 77.0 | 79.0 | 69.0 | 0.128 |
| Removal of manure and dead animals | 56.5 | 77.0 | 67.0 | 63.0 | 77.0 | 63.5 | 63.5 | 0.093 |
| Entrance of visitors and personnel | 30.0 | 80.0 | 65.0 | 71.0 | 74.0 | 66.5 | 73.0 | 0.107 |
| Supply of materials | 56.0 | 100.0d,e,g | 100.0a,b,f,h | 100.0f,g,k | 100.0h,i,j,k | 100.0b,c,e,j | 100.0a,c,d,i | 0.002 |
| Infrastructure and biological vectors | 64.0 | 75.5g | 75.5a,c,e | 77.0c,d,h | 63.0e,f,g,h | 71.5b,d | 80.0a,b,f | <0.001 |
| Location | 71.0 | 67.0c | 67.0a | 63.0a,b,c | 63.0 | 81.0b | 65.0 | 0.034 |
| Subtotal | 57.0 | 73.0 | 68.5 | 70.0 | 70.0 | 67.0 | 67.5 | 0.086 |
| Internal biosecurity | ||||||||
| Disease management | 68.0 | 77.0 | 77.0 | 77.0 | 77.0 | 77.0 | 77.0 | 0.598 |
| Cleaning and disinfection | 50.5 | 87.0a,b,c,f | 66.0a,d,h | 74.0d,e,f,g | 79.0h,i,j | 62.0c,g,j | 67.0b,e,i | <0.001 |
| Materials and measures between compartments | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.331 |
| Subtotal | 67.5 | 82.0a,b,c,i | 76.0a,e | 79.0e,f,g,h | 77.0h,i | 77.0h,i | 73.0b,f | <0.001 |
| Total biosecurity scores | 60.0 | 76.5a,b,c,e | 72.0a,d | 73.0d | 72.0e | 70.0c | 72.5b | 0.047 |
a–kMedians in the same subcategory (row) with the same letter superscript are statistically different at P < 0.05.
1
Excluding Aurora in the comparison of medians.