Arthus reaction

noun

Ar·​thus reaction ˈär-thəs-  ȧr-ˈtᵫ̅s- 

variants also Arthus phenomenon

: a hypersensitivity reaction that occurs several hours to days following the intradermal injection of a vaccine into an animal and is marked by the formation of antigen-antibody complexes accompanied by localized inflammation, pain, redness, and sometimes tissue destruction