Russell's viper

Russell's viper

Russell's viper (Daboia russelii) produces one of the most excruciatingly painful bites of all venomous snakes. Internal bleeding is common. Bruising, blistering and necrosis may appear relatively quickly as well. The Russell's viper is irritable, short-tempered and a very aggressive snake by nature and when it gets irritated it coils tightly, hisses, and strikes with a lightning speed. This species is responsible for more human fatalities in India than any other snakes species, causing an estimated 25,000 fatalities annually. TheLD₅₀ in mice, which is used as a possible indicator of snake venom toxicity, is as follows: 0.133 mg/kg intravenous, 0.40 mg/kg intraperitoneal, and about 0.75 mg/kg subcutaneous. For most humans, a lethal dose is approximately 40–70 mg. However, the quantity of venom produced by individual specimens is considerable. Reported venom yields for adult specimens range from 130–250 mg to 150–250 mg to 21–268 mg. For 13 juveniles with an average length of 79 cm, the average venom yield was 8–79 mg (mean 45 mg).