Table 1.
Summarized immunohistochemical findings for the detection of Usutu virus-antigen in various organs and animals.
| Organ | Number of animals positive for USUV antigen | Summarized total number of animals positive for USUV antigen | Number of animals lacking viral antigen expression | Total number of examined animals | ||
|---|---|---|---|---|---|---|
| Mild | Moderate | Marked | ||||
| Spleen | 9 | 3 | 4 | 16 (84%) | 3 (16%) | 19 |
| Bursa fabricii | 3 | 3 | - | 6 (75%) | 2 (25%) | 8 |
| Liver | 3 | 7 | 6 | 16 (73%) | 6 (27%) | 22 |
| Heart | 13 | 5 | - | 18 (82%) | 4 (18%) | 22 |
| Skeletal muscle | 2 | - | - | 2 (67%) | 1 (33%) | 3 |
| Brain | 10 | 7 | 2 | 19 (86%) | 3 (14%) | 22 |
| Lung | 11 | 8 | - | 19 (83%) | 4 (17%) | 23 |
| Pancreas | 6 | 1 | - | 7 (78%) | 2 (22%) | 9 |
| Proventriculus | 4 | 3 | - | 7 (78%) | 2 (22%) | 9 |
| Gizzard | 3 | 3 | 6 (67%) | 3 (33%) | 9 | |
| Intestine | 6 | 6 | 12 (71%) | 5 (29%) | 17 | |
| Kidney | 7 | 6 | - | 13 (72%) | 5 (28%) | 18 |
USUV, Usutu virus; mild, few immunopositive cells; moderate, moderate numbers of immunopositive cells; marked, high numbers of immunopositive cells; -, lacking specific score.