Botryomycosis

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  • Caused by Staphylococcus aureus
  • Occurs in horses and pigs usually due to wounds
  • Lowgrade persistent infection -> granulomatous lesions
  • Grossly:
    • Hard nodules with fibrous capsule in muscles
    • Contain yellow-brown pus and granules
  • Histologically:
    • Encapsulated granulomatous lesions
    • Central club colonies
    • Staphylococci are present