Immediate
Hypersensitivity
Immediate hypersensitivity. It includes three types: (a) Type I (anaphylactic hypersensitivity). It involves IgE, mast cells, basophils and mediators that induce muscle contraction. (b) Type II (cytotoxic hypersensitivity). It involves IgG, IgM, complement, and the destruction of host cells. (c) Type III (immune complex hypersensitivity). It involves IgG,IgM, complement, and the formation of antigen-antibody aggregates in the tissues.
