<prompt> PK reactio detects -IgGIgAIgEIgM  <response>: The Prausnitz-Kustner test PK test, Prausnitz-Kustner reaction is an immunologic test formerly used by physicians to determine if a patient has an allergic reaction to a specific antigen i.e, IgE Ref: Ananthanarayan Parkers textbook of microbiology 9th edition pg:98 