Before you can start your clinical rotation, you are required to get a tuberculosis (TB) test. The clinician injects a small amount of tuberculin purified protein derivative (PPD) under the skin of your forearm. Within about 30 minutes, you develop a swollen, itchy rash on your forearm where the PPD was injected. What type of hypersensitivity is this? What might have caused this result?

Before you can start your clinical rotation, you are required to get a tuberculosis (TB) test. The clinician injects a small amount of tuberculin purified protein derivative (PPD) under the skin of your forearm. Within about 30 minutes, you develop a swollen, itchy rash on your forearm where the PPD was injected. What type of hypersensitivity is this? What might have caused this result?

Human Physiology: From Cells to Systems (MindTap Course List)

9th Edition

ISBN:9781285866932

Author:Lauralee Sherwood

Publisher:Lauralee Sherwood

Chapter12: Body Defenses

Section: Chapter Questions

Problem 1ACR

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