RT Book, Section A1 Zafren, Ken A1 Thurman, R. Jason A1 Jones, Ian D. A2 Knoop, Kevin J. A2 Stack, Lawrence B. A2 Storrow, Alan B. A2 Thurman, R. Jason SR Print(0) ID 1177128405 T1 Hymenoptera Envenomation T2 The Atlas of Emergency Medicine, 5e YR 2021 FD 2021 PB McGraw-Hill PP New York, NY SN 9781260134940 LK accessemergencymedicine.mhmedical.com/content.aspx?aid=1177128405 RD 2021/01/21 AB The order Hymenoptera includes wasps, hornets, yellow jackets, bees, and ants. Envenomation usually results in local pain, mild erythema, swelling, and pruritus. Severe systemic or toxic reactions may occur from one or multiple stings, manifesting as gastrointestinal symptoms, headache, pyrexia, muscle spasms, or seizures. Anaphylaxis may occur within minutes from a single sting and may cause death from airway obstruction and/or cardiovascular collapse. A serum sickness–type reaction may occur 7 to 14 days after envenomation.