Table 2 Scoring of RNAscope ISH and IHC signal in brain slices

From: Mystery of fatal ‘staggering disease’ unravelled: novel rustrela virus causes severe meningoencephalomyelitis in domestic cats

Score

Description

Negative

No specific staining detectable

Uncertain

Very few signals, not clearly associated with cellular structures

1

Signals in the cytoplasm or processes of singular neurons or glial cells

2

Signals in an average of 5–10 cells per field (in 40-fold magnification in a 0.237 mm2 field area)

3

Signals in an average of more than 10 cells (up to ~100) per field (in 40-fold magnification in a 0.237 mm2 field area)