Ascaris suum
- Ascariasis
- 'milk spot' liver
- pigs
- common incidental finding at post mortem examination
- affected livers are condemned at meat inspection
Gross
- initial haemorrhagic tracts through the liver attributed to the migration of ascarid larvae
- later stages show fibrosis of these tracts as poorly defined, diffuse, white spots on the capsular surface
Microscopically
- initial haemorrhage and necrosis of parenchyma along the tracts
- later repair by fibrous tissue at foci
- inflammatory cell response contains many eosinophils, as well as lymphocytes and macrophages