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Frequency of isolation of challenge virus in different vaccine groups.
| Group | Vaccine | Antibody Titers (log2) | No. Swabs Positive in Virus Isolation/Total No. of at Days Post Challenge | |||||
|---|---|---|---|---|---|---|---|---|
| 3 dpc | 5 dpc | 7 dpc | ||||||
| T a | C b | T | C | T | C | |||
| LaSota | LaSota | 6 | 10/12 | 4/12 | 4/9 | 5/9 | 0/9 | 3/9 |
| AI4 | NDV/AI4 | 6 | 9/12 | 1/12 | 3/9 | 2/9 | 0/9 | 0/9 |
| O/AI4 | NDV O/AI4 | 6 | 4/12 | 0/12 | 2/9 | 1/9 | 0/9 | 0/9 |
| Control | PBS | 0 | 5/5 | 5/5 | - c | - | - | - |
a Tracheal swabs; b Cloacal swabs; cPle All birds in the control group died before 5 dpc.
