Arthus reaction

From Biology-Online Dictionary | Biology-Online Dictionary

Arthus reaction

(Science: dermatology, immunology) a localised inflammation due to injection of antigen into an animal that has a high level of circulating antibody against that antigen.

a haemorrhagic reaction with oedema occurs due to the destruction of small blood vessels by thrombi. It may occur, as in farmers lung, as a reaction to natural exposure to antigen.