Table 1 Summarized immunohistochemical findings for the detection of Usutu virus-antigen in various organs and animals.

From: Analysis of avian Usutu virus infections in Germany from 2011 to 2018 with focus on dsRNA detection to demonstrate viral infections

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

  1. USUV, Usutu virus; mild, few immunopositive cells; moderate, moderate numbers of immunopositive cells; marked, high numbers of immunopositive cells; -, lacking specific score.