Background The phenotypic polymorphism in rattlesnake venoms has been thoroughly documented, showing a dichotomy between haemorrhagic (Type I) and neurotoxic (Type II) venoms. In South America, the Type II phenotype is predominant; however, evidence exists of Type I haemorrhagic venoms in C. d. ruru...
ORGANISM(S): Crotalus durissus ruruima
