Groups | Mortality % | Morbidity % | ITPIa |
|---|
Negative control | 0 | 0 | 0.0 |
CS | 10% | 75% | 1.266667 |
RS | 16.6% | 85% | 1.483333 |
VEC + CS | 1.6% | 26.6% | 0.53 |
VEC + RS | 3.3% | 30% | 0.58 |
CEO + CS | 4.5% | 35% | 0.633333 |
CEO + RS | 6.6% | 48.3% | 0.9 |
TCO + CS | 7.3% | 45% | 0.783333 |
TCO + RS | 8.1% | 52% | 1 |
- aThe pathogenicity was assessed using intratracheal pathogenicity index (ITPI). Clinical symptoms and mortalities were rated daily for seven days post-infection as follows: (0 = normal, 1 = mild respiratory signs as coughing, sneezing, 2 = moderate respiratory signs as mouth breathing and dyspnea, 3 = death). Indices were evaluated by dividing the totality of the scores over the total number of chickens. CS: CEO like strain, RS: Recombinant strain, VEC + CS: Vector vaccinated group challenged with CEO like strain, VEC + RS: Vector vaccinated group challenged with recombinant strain, CEO + CS: CEO vaccinated group challenged with CEO like strain, CEO + RS: CEO vaccinated group challenged with recombinant strain, TCO + CS: TCO vaccinated group challenged with CEO like strain, TCO + RS: TCO vaccinated group challenged with recombinant strain
