Skip to main content

Table 1 Semi-quantitative score system for comparing lesion severity between tissues.

From: No influence of oxygen levels on pathogenesis and virus shedding in Salmonid alphavirus (SAV)-challenged Atlantic salmon (Salmo salar L.)

Score

Description

Pancreas lesions

 

0

Normal appearance

1

Focal pancreatic acinar cell degeneration ± inflammation

2

Multifocal degeneration/atrophy of pancreatic acinar tissue, plus some normal tissue left ± inflammation

3

Significant multifocal degeneration/atrophy of pancreatic acinar tissue, no normal tissue left ± inflammation

Heart lesions

 

0

Normal appearance

1

Focal myocardial degeneration and/or inflammation (< 50 fibres affected)

2

Multifocal myocardial degeneration ± inflammation (50-100 fibres affected)

3

Severe diffuse myocardial degeneration ± inflammation (> 100 fibres affected)

Muscle lesions

 

0

Normal appearance

1

Focal myocytic degeneration ± inflammation

2

Multifocal myocytic degeneration ± inflammation

3

Severe diffuse myocytic degeneration± inflammation

  1. The system was adapted from McLoughlin et al (2006) [22] with some modifications.