Peanut and fish allergy due to platelet transfusion in a child

Timeline of events in an 8-year-old patient with peanut and fish allergy from platelet transfusion. Pooled platelets suspended in 200 mL of plasma from an atopic donor with allergies to peanuts, tree nuts, shellfish and all fish were transfused on day 4. Allergic reactions occurred 9 and 13 days after this transfusion. Other platelet transfusions included plasma from donors without allergies, and SAGM red blood cell transfusion had less than 5 mL of plasma from a donor with an unknown allergy status. SAGM = saline–adenine–glucose–mannitol. *Requested as add-on measurement in sample drawn on day 15 after reaction on day 17.