. "W57 (nonvenomous)" . "X21 (venomous)" . "A spider bite, also known as arachnidism, is an injury resulting from the bite of a spider. The effects of most bites are not serious. Most bites result in mild symptoms around the area of the bite. Rarely they may produce a necrotic skin wound or severe pain.Most spiders do not cause bites that are of importance. For a bite to be significant, substantial envenomation is required. Bites from the widow spiders involve a neurotoxic venom which produces a condition known as latrodectism."@en . "Spider bite"@en . "989.5" . "E906.4" . "E905.1" . . "T14.1T63.3" .