Bites & Stings Snake Bite 101: Your phone + your car keys. Call the poison center for medical advice and be prepared to travel to medical treatment. If the victim has trouble breathing or loses consciousness, call 911 immediately. Click the image above for more information about snake bites. Black widow spider bites can be dangerous, especially to young children and the elderly. Fatal bites are rare. Call the poison center if someone is bitten by a black widow spider 1-800-222-1222. Click the image above for more information about black widow spider bites.