Purulent Inflammation

From WikiVet English
Jump to navigation Jump to search
  • In purulent inflammation, pus is the predominant feature.
    • Pus is an admixture of dead and dying neutrophils with necrotic cells and a pyogenic agent.
      • Proteolytic enzymes released by the dying neutrophils lyse tissue cells to produce a fluid.
  • Colour varies depending upon the agent.
    • May be white, yellow, green or brown.
  • An abscess is a circumscribed sphere of pus surrounded by a pyogenic membrane.
    • The pyogenic membrane is composed of capillaries bringing neutrophils into the sphere.
    • This rapidly becomes enveloped by a fibrous tissue capsule.
      • A local connective tissue response attempting to wall off the purulent irritant from nearby normal tissue.