Question

Which one of the following is not an example of a type IV hypersensitivity?

a) Contact dermatitis
b) Tuberculin skin test reaction
c) Rheumatoid arthritis
d) Multiple sclerosis

Answer 1

Type IV hypersensitivity includes contact dermatitis and tuberculin skin test reactions, while rheumatoid arthritis and multiple sclerosis are autoimmune diseases.

Step-by-step explanation:

Type IV hypersensitivity is a cell-mediated immune response that involves T cells and effector cells. Examples of type IV hypersensitivity include contact dermatitis, such as poison ivy rash, and tuberculin skin test reactions. Rheumatoid arthritis and multiple sclerosis are autoimmune diseases and not examples of type IV hypersensitivity.