Hemorrhagic spots with different sizes are shown in a symmetry. The hemorrhagic spots resulted from intradermal injections of aliquots of 0.2 ml of mixtures of the test snake venom and the regional reference containing 0.64 U, 0.80 U, 1.00 U, 1.26 U, and 1.60 U of the antivenom (C), whereas the results were from injections with the antivenom of the candidate in aliquots of 0.2 ml of mixtures (T), from top to bottom. Bar 10 mm