TABLE 2.
Morbidity, mortality, and MDT resulting from IN inoculation of 2-week-old chickens with 0.1 ml of inoculum containing 106 EID50/ml of the reassortant viruses
| Recombinant virus | No. of sick/dead/total | MDTa |
|---|---|---|
| rEgret | 8/8/8 | 3.25b |
| rIndo | 7/6/8d | 6.1c |
| rIndo/rEgret HA | 8/8/8 | 5.25c |
| rIndo/rEgret NA | Not rescued | Not rescued |
| rIndo/rEgret NS | 8/8/8 | 5.12c |
| rIndo/rEgret M | 8/8/8 | 5.0 |
| rIndo/rEgret NP | 8/8/8 | 2.3b |
| rIndo/rEgret PB2 | 8/3/8e | 6.3c |
| rIndo/rEgret PB1 | 8/2/8e | 6.5c |
a
The MDTs of all groups were significantly different from that of the control group.
b
MDTs were significantly different from the rIndo group.
c
MDTs were significantly different from the rEgret group.
d
Two birds survived. One presented no clinical signs; the other one presented only mild hemorrhages in the shanks and combs.
e
The surviving birds presented only mild hemorrhages in the shanks and combs.