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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
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PK reaction detects
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The correct answer is  The Prausnitz-Kustner test is an immunologic test formerly used by physicians to determine if a patient has an allergic reaction to a specific antigen. IgE is homocytotropic i.e. species specific. Only human IgE can fix to the surface of human cells. This is the basis of Prautnitz- Kustner reaction, which was the original method of detecting atopic antibody. Examples of Type I Hypersensitivity Reaction.