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Table 3 Criteria used for the classification of lungs based on macroscopic examination after removal from the abattoir

From: First confirmation by PCR of Jaagsiekte sheep retrovirus in Ireland and prevalence of ovine pulmonary adenocarcinoma in adult sheep at slaughter

Macroscopic Lesion Category

Description

Abscess(es)

Single-multiple, variably-sized, well-demarcated, round nodules with fibrous capsule and central cavity filled with white/green/yellow creamy material (pus)

Cranioventral consolidation

Ventral aspects of cranial +/− middle lung lobes dark red-purple in colour, well-demarcated, firm on palpation

Discolouration

Any region of discolouration distinct from others described in classification system

Fibrosis

Firm, pale, fibrous scar tissue

Focal firm nodule

Focal-multifocal, variably-sized, well-demarcated, firm, homogenously solid, grey nodule(s) within parenchyma

Mineralisation

Mineralised foci not consistent with parasitic granulomas

Other

Lesions not consistent with others listed

Subpleural parasitic granulomas

Multifocal pale tan/green well-demarcated, irregularly-circular slightly raised foci, up to2cm diameter, on dorsal aspect of the caudal lung lobes, +/− mineralisation

Macroscopic Suspect OPA (MSO)

Locally-extensive, well-demarcated, consolidated, heavy, oedematous, grey-purple areas

Uncollapsed

Diffusely uncollapsed