Article Text

Effects of bites by the European adder (Vipera berus) in seven Swedish horses
  1. K. G. Anlén, DVM, MRCVS1
  1. 1 Strömsholm Regional Equine Hospital, Djursjukhusvägen 11, 734 94 Strömsholm, Sweden
  1. Ms Anlén's present address is 32 Rockform Close, Little Neston, Cheshire CH64 4DX


The effects on seven horses of bites by the European adder (Vipera berus) are described and compared with previously available information. The clinical signs varied from local swelling and mild systemic signs to severe systemic signs, including systemic inflammatory response, severe tissue necrosis, ventricular tachycardia and dysphagia. Two of the horses were treated with ‘Zagreb’ antiserum, and three that were not treated with antiserum were euthanased owing to complications related to the bites.

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