Cape Cobra Because of their usual contact with humans, the Cape cobra is regarded as one of the most dangerous venomous snake species in Africa. This is a highly venomous snake, with the most powerful venom of all African cobra species, it has also one of the highest rates of fatalities. The subcutaneous LD50 value of their venom in mice is 0.72 mg/kg. The average quantity of venom injected in a bite is 100 to 150 mg and composed of deadly cardiotoxins and neurotoxins. The cape cobra venom is thick and with the consistency of syrup. The snake uses its venom to target the nervous and respiratory system and also the heart. A bite to an adult human has a 60% chance of death if no antivenom is applied. The envenomation symptoms include mild local pain or Numbness around bite site, excessive salivation, loss of consciousness, convulsions, drowsiness, eyelid drooping, limb paralysis. Deaths occur anywhere from 1 hour in very severe cases up to 10 hours or more, the bite victims usually die from respiratory failure, due to paralysis caused by the venom. Local tissue necrosis may also occur.