Category:Acute Inflammation
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Fluids
Serous Inflammation
Catarrhal Inflammation
Fibrinous
- Fibrinous exudation occurs in more severe endothelial injury.
- Injury results in the escape of fibrinogen, which is converted to fibrin.
- The fibrin formed appears as a yellowish coagulation on the surface of or within a tissue.
- Common in the lungs and on serous surfaces.
- In hollow organs the fluid may coagulate to form casts of the lumen.
- Fibrin will peel off from the underlying tissue without causing damage to it.
Diptheritic
- Diphtheritic exudate a more severe form of fibrinous exudate in which there is considerable necrosis of the underlying tissues.
- Diptheritic exudate is firmly adherent to the underlying tissue.
- Attempts at removal cause tearing of this tissue>
- Commonly seen with internal surface fungal infections.
- E.g. in the nose of the dog and the guttural pouch of the horse.
- Fungal toxins penetrate the underlying tissue causing coagulation necrosis.
Haemorrhagic
- This is a severe acute to peracute inflammation in which haemorrhage is the main component.
- Seen in the lymph nodes, lungs and intestine in severe inflammation.
Purulent
- 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.
- Pus is an admixture of dead and dying neutrophils with necrotic cells and a pyogenic agent.
- 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.
Pages in category "Acute Inflammation"
The following 8 pages are in this category, out of 8 total.