Although most aparallactines are harmless, the Natal black snakes require care. Its bite has caused nausea and loss of consciousness, although not death. All burrowing asps, however, are venomous and a few are dangerously so. The venom glands are large and in some species extend into the neck. The venom is unique among snakes and causes severe pain, swelling, local blistering, nausea, vomiting, and diarrhea. Bites from most species are mild, but deaths have been caused by three species. There is no effective antivenom. Most bites occur at night when the victim either treads on the snake or rolls over onto it while asleep. They are easily confused with harmless snakes.
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