Anti-K Was Detected in a Patient's Serum 1 Year Ago

Question 17
Multiple Choice

Anti-K was detected in a patient's serum 1 year ago in a routine antibody screen. This patient was transfused red cells containing antigen specific for anti-K. Forty-eight hours later the patient began exhibiting signs of a hemolytic anemia. What type of transfusion reaction is present? A) Delayed B) Acute C) Immediate D) Allergic E) Febrile