Table 1.
Descriptive results of the housing of the broiler farms included in the study
| Subcategory | Situation on farm | Number of farmsd | % of total |
|---|---|---|---|
| Floor qualitya | Smooth impervious | 132 | 37.7 |
| Fair condition | 46 | 13.1 | |
| Cracked to some degree | 165 | 45.9 | |
| Compacted earth | 15 | 4.2 | |
| Ventilationb | Roof ventilation | 104 | 29.1 |
| Cross ventilation | 74 | 20.7 | |
| Roof x Tunnel ventilation | 72 | 20.2 | |
| Tunnel | 40 | 11.2 | |
| Cross x Tunnel ventilation | 37 | 10.3 | |
| Natural ventilation | 26 | 7.3 | |
| Other | 5 | 1.4 | |
| Heating systemc | Direct | 194 | 54.3 |
| Indirect | 164 | 45.7 |
aFloor quality was scored into four categories from “smooth impervious” (best situation) to “compacted earth” (worst situation). bThe type of ventilation system used to refresh the air inside the broiler house. cThe heating system was classified into two categories: direct heating (CO2 is produced inside the broiler house) and indirect heating (no CO2 is produced inside the broiler house. d Number of farms that have this situation on farm, a total of 358 broiler farms participated in this study