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Seroprevalence of avian infectious bronchitis viruses (IBV) antibody (ELISA assay, Biocheck) in unvaccinated backyard chickens in Mazandaran province, Iran, 2014.
| City | No. of. Samples | Positive (Percent) | Mean Titer |
|---|---|---|---|
| Behshar | 32 | 93.75 | 7115 |
| Sari | 89 | 98.80 | 7597 |
| Jouybar | 48 | 100 | 7211 |
| Neka | 60 | 31.7 | 6171 |
| Nour | 24 | 58.4 | 1866 |
| Babolsar | 28 | 46.4 | 3745 |
| Ghaemshahr | 52 | 21.2 | 2835 |
| Amol | 67 | 14.9 | 1373 |
| Babol | 60 | 30 | 6629 |
| Total & Average | 460 | 54.5% | 4949 |
