Table 1 Gross pathology findings of Atlantic salmon affected with heart and skeletal muscle inflammation (HSMI) and coho salmon affected with HSMI-like disease

Yellow liver

60.3 %

55.3 %

Hemopericardium

28.6 %

55.3 %

Pale gill

19.0 %

56.5 %

Nutmeg liver

19.0 %

-

Pale heart

19.0 %

43.5 %

Splenomegally

17.5 %

29.4 %

Visceral melanosis

15.9 %

-

Petechiae in visceral fat

15.9 %

7.1 %

Liver pseudomembrane

12.7 %

-

Ascites

12.7 %

20.0 %

Congestion in intestines

11.1 %

-

Hemorrhagic eye

11.1 %

-

Hepatomegally

9.5 %

-

Renomegally

4.8 %

10.6 %

Fluid content in stomach

3.2 %

14.1 %

Congestion in pyloric caeca

3.2 %

-

Clotted blood in the abdominal cavity

3.2 %

17.6 %

Jaundice

1.6 %

24.7 %

Biliary cholestasis

-

31.8 %

Spinal fracture

-

22.4 %

Kidney rupture

-

11.8 %

Lipid cysts in visceral fat

-

7.1 %

Accumulation of feed oil in the stomach

-

5.9 %

Exophthalmia

-

2.4 %

Hydropericardium

-

2.4 %

Gastric dilatation (bloat)

-

2.4 %