Abstract
An indirect haemolytic assay for assessing antivenoms. Toxicon 29, 1043–1046, 1991. Dilutions of antivenom, venom, human erythrocytes and a phosphatidylcholine suspension, were incubated for 30 min at 37°C. After centrifugation, the liberated haemoglobin was measured spectrophotometrically. The assay was used to assess an ovine antivenom against the venom from the South American rattlesnake, Crotalus durissus terrificus, and an equine Wyeth antivenin (Crotalidae, polyvalent). The ovine antivenom was more than five times as effective as the equine product. It also neutralized venoms from the Western diamondback rattlesnake, Crotalus atrox, and the fer-de-lance, Bothrops atrox. However, antivenoms raised against venoms from other Crotalus and Bothrops species provided little protection against the haemolytic activity of C. d. terrificus venom.
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