Table 5.
Post-mortem changes reported in susceptible chickens following pathogenicity testing.
| Group | Post-Mortem Changes | Lesions in Dead Birds (Days Post-Inoculation) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 3rd | 4th | 5th | 6th | 7th | 8th | 9th | 10th | ||||
| No. of examined birds | Dead | 3 | 4 | 5 | 1 | 7 | 2 | 3 | 3 | ||
| Euthanized | 3 | 0 | 0 | 0 | 3 | 0 | 0 | 3 | |||
| Hemorrhagic tracheitis | 0/6 | 3/4 | 3/5 | 0/1 | 9/10 | 2/2 | 2/3 | 6/6 | |||
| G1 | Lung congestion | 0/6 | 3/4 | 3/5 | 0/1 | 8/10 | 1/2 | 2/3 | 6/6 | ||
| Hemorrhagic cecal tonsils | 1/6 | 2/4 | 3/5 | 0/1 | 6/10 | 1/2 | 3/3 | 5/6 | |||
| Enlarged spleen | 1/6 | 4/4 | 5/5 | 1/1 | 9/10 | 2/2 | 3/3 | 5/6 | |||
| Hemorrhages on the periventricular gland tips | 0/6 | 3/4 | 3/5 | 1/1 | 10/10 | 2/2 | 2/3 | 6/6 | |||
| Greenish proventricular and intestinal contents | 0/6 | 3/4 | 5/5 | 1/1 | 8/10 | 2/2 | 3/3 | 6/6 | |||
| Hemorrhagic enteritis | 0/6 | 3/4 | 3/5 | 1/1 | 6/10 | 1/2 | 2/3 | 5/6 | |||
| No. of examined birds | Dead | 3 | 3 | 4 | 4 | 3 | 3 | 3 | 4 | ||
| Euthanized | 3 | 0 | 0 | 0 | 3 | 0 | 0 | 3 | |||
| G2 | Hemorrhagic tracheitis | 0/6 | 2/3 | 2/4 | 3/4 | 4/6 | 2/3 | 1/3 | 6/7 | ||
| Lung congestion | 0/6 | 3/3 | 3/4 | 2/4 | 4/6 | 1/3 | 0/3 | 5/7 | |||
| Hemorrhagic cecal tonsils | 2/6 | 2/3 | 1/4 | 3/4 | 3/6 | 1/3 | 2/3 | 3/7 | |||
| Enlarged spleen | 4/6 | 3/3 | 4/4 | 4/4 | 6/6 | 3/3 | 3/3 | 6/7 | |||
| Hemorrhages on the periventricular gland tips | 0/6 | 3/3 | 4/4 | 3/4 | 3/6 | 2/3 | 1/3 | 7/7 | |||
| Greenish proventricular | 0/6 | 3/3 | 4/4 | 4/4 | 4/6 | 3/3 | 3/3 | 7/7 | |||
| Hemorrhagic enteritis | 0/6 | 2/3 | 2/4 | 4/4 | 3/6 | 1/3 | 1/3 | 5/7 | |||
| No. of examined birds | Dead | 2 | 4 | 3 | 4 | 4 | 5 | 2 | 1 | ||
| Euthanized | 3 | 0 | 0 | 0 | 3 | 0 | 0 | 3 | |||
| G3 | Hemorrhagic tracheitis | 0/5 | 3/4 | 1/3 | 1/4 | 5/7 | 2/5 | 0/2 | 3/4 | ||
| Lung congestion | 0/5 | 2/4 | 2/3 | 2/4 | 6/7 | 3/5 | 1/2 | 2/4 | |||
| Hemorrhagic cecal tonsils | 0/5 | 3/4 | 2/3 | 3/4 | 5/7 | 4/5 | 0/2 | 0/4 | |||
| Enlarged spleen | 2/5 | 4/4 | 3/3 | 3/4 | 7/7 | 4/5 | 1/2 | 4/4 | |||
| Hemorrhages on the periventricular gland tips | 0/5 | 2/4 | 3/3 | 2/4 | 7/7 | 2/5 | 2/2 | 3/4 | |||
| Greenish proventricular and intestinal contents | 0/5 | 3/4 | 3/3 | 4/4 | 7/7 | 5/5 | 2/2 | 4/4 | |||
| Hemorrhagic enteritis | 0/5 | 1/4 | 2/3 | 1/4 | 5/7 | 3/5 | 0/2 | 1/4 | |||
| G4 | No. of examined birds | Dead | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| Euthanized | 3 | 0 | 0 | 0 | 3 | 0 | 0 | 3 | |||
| PM lesions | 0/3 | 0/0 | 0/0 | 0/0 | 0/3 | 0/0 | 0/0 | 0/3 | |||