Prausnitz-kustner reaction is a

Prausnitz-Kustner test was formerly used to determine if a patient has an allergic reaction to a specific antigen. A patients serum is injected in healthy person skin and antigen was injected at same site 24 hours later.If the patient was sensitive it would trigger a type I reaction. <img class="fr-dib" style="width: 300px;" src=" /> Ref : Ananthanarayana textbook of Microbiology 9th edition Pgno : 165