A patient develops hemolytic anemia after receiving penicillin. The drug binds to RBCs, forming a target for antibodies. Which mechanism is involved?
Show answer and explanation
Correct answer: Type II hypersensitivity
Penicillin acts as a hapten, triggering Type II antibody-mediated destruction of RBCs. Complement contributes to hemolysis.
Keep practicing
More Hypersensitivity and Autoimmunity questions
- A patient experiences serum sickness after receiving antivenom. What causes this reaction?
- Contact dermatitis due to poison ivy exposure is caused by which immune mechanism?
- Graves disease involves autoantibodies that stimulate the TSH receptor. Which hypersensitivity type is this?
- A patient with myasthenia gravis produces antibodies that block acetylcholine receptors. Which hypersensitivity classification fits this?
- A biopsy from a patient with granulomatous inflammation shows macrophages surrounded by activated T cells. Which hypersensitivity type is i…
- A man develops a rash 10 days after starting a new antibiotic. Immune complex deposition is suspected. Which test helps confirm Type III hy…