Immunity NCLEX Questions Related

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A client in the medical ward developed sudden hypotension, difficulty breathing, and cyanosis shortly after receiving an intravenous penicillin infusion. Based on the nurses' understanding of anaphylactic reactions, what can the nurse conclude is the cause of this reaction?

  • A. Potent antibodies formed when the antibiotic was infused into the client during this infusion.
  • B. The client was previously exposed to penicillin, enabling their body to produce antibodies.
  • C. The client developed passive immunity to penicillin.
  • D. Atopic sensitization occurred.
Correct Answer: B

Rationale: Anaphylaxis occurs due to prior exposure to penicillin (B), leading to IgE antibody production and a rapid allergic response upon re-exposure. Antibodies don't form instantly during infusion (A), passive immunity (C) involves transferred antibodies, and atopic sensitization (D) is a predisposition, not the direct cause.