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| Groups of sentinel chickens | Weeks after cohabitation / Identity of gene types |
|||||
|---|---|---|---|---|---|---|
| 0* | 1* | 2* | 3 | 4 | 5 | |
| Immunized | – | – | V a) | V | V | – |
| Non-immunized | – | A | V | V | – | – |
| Broiler | – | – | V | V | V | – |
a) V: Unique gene type that was different from that of known IBDVs. A: Gene type of the live vaccine virus (K strain) used on the study farm. * Time point at which live vaccine was administered.
