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Types
of acute inflammatory exudates:
Exudates are classified according to:
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Time – peracute, acute, subacute, chronic
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Gross appearance – catarrhal (lots of mucus),
haemorrhagic (lots of blood), purulent/suppurative (pus)
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Histological appearance – purulent/suppurative
(exudate predominantly neutrophils), mononuclear (exudate predominantly
mononuclear cells eg plasma cells, lymphocytes)
The following pictures are all examples of purulent/suppurative
exudates:
Purulent exudate
Purulent exudate
Haematoxylin & Eosin (x400)
Abscess
Abscess
Abscesses
 
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