Abstract
The midget faded rattlesnake ( Crotalus viridis concolor) venom: lethal toxicity and individual variability. Toxicon 15, 129–133, 1977.— Crotalus viridis concolor venoms were collected from captive specimens from northeastern Utah and tested for lethal potency in mice and for protein content by polyacrylamide gel electrophoresis. We found C. v. concolor potency (i.p.- ld 50-0·25 μg per g) comparable to Crotalus durisses terrificus (i.p.- ld 50-0·25 μg) and Crotalus scutulatus scutulatus (California variety) (i.p.- ld 50-0·24 μg per g) venoms. Individual C. v. concolor venoms show a wide variability both in lethality and protein pattern. The venom appears to be one of the most lethal Crotalid venoms in the New World.
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