What are the histological signs of allergic reactions?
Allergic reactions can be identified by:
- Eosinophil Infiltration: Eosinophils are a hallmark of allergic reactions, and their presence in tissues indicates an allergic response. - Edema and Urticaria: Swelling and fluid accumulation in tissues. - Mast Cell Degranulation: Release of histamine and other mediators from mast cells, often visible with toluidine blue staining.
