A type IV delayed hypersensitivity reaction, and describe the role of T cells in the pathogenesis of this condition. Concept introduction: Type IV hypersensitivities result observed when T cells respond to antigens displayed on the tissue of the host or transplanted foreign cells. Type IV hypersensitivity is also known as delayed hypersensitivity because, the symptoms arise several days after the second contact with an antigen.

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Chapter 16.5, Problem 14AYP

Summary Introduction

To identify:

A type IV delayed hypersensitivity reaction, and describe the role of T cells in the pathogenesis of this condition.

Concept introduction:

Type IV hypersensitivities result observed when T cells respond to antigens displayed on the tissue of the host or transplanted foreign cells. Type IV hypersensitivity is also known as delayed hypersensitivity because, the symptoms arise several days after the second contact with an antigen.

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