Types of Inflammatory Exudate





An inflammatory exudate is a fluid that filters from the circulatory system into lesions or areas of inflammation.

It composes water and solutes like sap or blood (e.g. plasma proteins, white blood cells, platelets and red blood cells

Types of Inflammatory Exudate

• Serous - usually seen in mild inflammation, with little protein content. Its consistency is clear and watery, and can usually be seen in certain disease states like tuberculosis

• Fibrinous - composed mainly of fibrinogen and fibrin. It is characteristic of rheumatic carditis, but can also be seen in all severe injuries like strep throat and bacterial pneumonia. It is usually difficult to resolve due to the fact that blood vessels grow into the exudate and fill the space that was occupied by fibrin.

• Catarrhal - it is seen during runny nose or during a common cold and is characterized by a high content of cloudy mucus

• Purulent – it consists of plasma with both active and dead neutrophils, fibrinogen, and necrotic parenchymal cells. This kind of exudate is consistent with more severe infections, and is commonly referred to as pus (yellow) or green opaque discharge.

• Hemorrhagic – is a result of hemorrhage from the blood vessels of a spurious membrane causing fulminating infection and a presence of RBC in the exudate

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