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Experimental design showing number of birds, viral titer, and DE dose in each experimental group.
| Group | Number of birds | Titer per dose (EID50%) | DE (mg/dose) |
|---|---|---|---|
| Spray DE+IBV | 13 | 103.7 | 2 |
| Spray IBV | 13 | 103.7 | – |
| Spray DE | 9 | – | 2 |
| Ocular DE+IBV | 13 | 103.7 | 2 |
| Ocular IBV | 15 | 103.7 | – |
| Ocular DE | 9 | – | 2 |
DE: diatomaceous earth, IBV: infectious bronchitis virus, EID50%: embryo infectious dose 50%.
