Table 2 Lung lesion scoring in chickens.

From: Co-infection of Chlamydia psittaci with H9N2, ORT and Aspergillus fumigatus contributes to severe pneumonia and high mortality in SPF chickens

Assigned score

Lung lesions

0 score

None.

1 score

Slight oedema of the alveolar walls.

2 score

Moderate oedematous thickening of alveolar walls with occasional alveoli containing coagulated oedema fluids.

3 score

Extensive occurrence of alveolar and interstitial oedema.

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