Anaphylaxis refers to
The general mechanism of immediate hypersensitivity involves a series of steps. An antigen induces the formation of IgE antibody, which binds firmly by its Fc poion to high-affinity IgE receptors on mast cells, basophils, and possibly eosinophils.Sometime later, an individual experiences a second exposure to the same antigen. This second exposure results in the cross-linking of the cell-bound IgE molecules and the release of pharmacologically active mediators.Jawetz 27e pg: 145
The severe reaction following primary injection of protein solutions
The state of immunity developed by repeated injections of any foreign substance
The severe reaction resulting from sensitive to common allergens
The severe reaction following re-injection of protein solution in a sensitized animal
Immunology