A patient is diagnosed with a type IV delayed hypersensitivity reaction. Which patient reaction is an example of this type of reaction?
1. The patient's hands are dry, red, swollen, and itchy after wearing a latex costume to a party 2 days ago.
2. The patient is light-headed and complains of nausea after being stung by a wasp.
3. The patient develops rash and joint pain a week after taking penicillin.
4. The patient goes into shock after receiving a unit of blood.
1
Rationale 1: Contact dermatitis is a classic example of a type IV reaction.
Rationale 2: A reaction to a wasp sting is an example of a type I reaction.
Rationale 3: Delayed rash and joint pain are associated with type III reactions.
Rationale 4: Autoimmune hemolytic anemia is an example of a type II reaction.
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