Injury caused by the venom of a honey bee (Apis mellifera). Multiple stings cause local swelling, pain and excitement, and may cause dyspnea if the head is affected. A systemic effect, including diarrhea, hemoglobinuria, jaundice, tachycardia and prostration, may be observed in horses.
note: a singular sting in a horse has quite a different meaning.

Saunders Comprehensive Veterinary Dictionary 3rd Edition. Copyright © 2007 by D.C. Blood, V.P. Studdert and C.C. Gay, Elsevier. All rights reserved.