Lethal potencies and immunoelectrophoretic profiles of venoms and Vipera bornmulleri and Vipera latifii.

Lethality determinations are reported for Vipera bornmulleri and V. latifii. V. latifii venom is significantly more toxic than V. bornmulleri by the i.v. route; by the i.p. and s.c. routes there is little difference between the species. Immunoelectrophoretic profiles indicate close antigenic relationship between venoms of these species and V. palaestinae and Bitis spp.; a more remote relationship with V. russelli and Echis carinatus. Protease activity of V. latifii venom is stronger than that of V. bornmulleri.