Muscles Inflammatory - Pathology
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Myositis
Viral Myositis
Parasitic Myositis
Immune-Mediated Myositis
Idiopathic Myositis
Canine Polymyositis
Canine Bilateral Extraocular Polymyositis
Bovine and ovine eosinophilic myositis
- Unknown aetiology
- Major cell involved is eosinphil
- Usually noticed at slaughter - green muscle discoloration
- May be caused by degenteration of Sarcocystis spp.
- Grossly:
- Green discolored areas, well demarcated
- Mostly in muscles of back and thighs
- Histologically:
- Massive eosinophil infiltration
- Muscle fibres may degenerate
- In old lesions - endimysial fibrosis, myofibre atrophy, some regeneration, lymphocytes, plasma cells, macrophages and few eosinophils
- Capsule may form