Table 1.
G. anatis isolates included in the study and their origin
| Chickens sampled from flock | Biosecurity level | G. anatis positive culture | Province |
|---|---|---|---|
| Battery-cage layer | High | 2 | Tehran |
| Battery-cage layer | Moderate | 10 | Tehran |
| Battery-cage layer | Moderate | 6 | Qom |
| Battery-cage layer | High | 3 | Qom |
| Battery-cage layer | Moderate | 9 | Qom |
| Battery-cage layer | Moderate | 8 | Sari |
| Battery-cage layer | Moderate | 8 | Sari |
| Battery-cage layer | Moderate | 8 | Sari |
| Broiler | Moderate | 8 | Sari |
| Broiler | Moderate | 7 | Sari |
| Broiler | Moderate | 8 | Qom |
| Broiler | Moderate | 7 | Qom |
Twelve farms were selected for samples collection. A total of 120 chickens’ samples (10 per flock) were collected during the period from June to September 2016.