Black widow spider

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Arachnids, basic features

Arthropods, basic features

Black widow spider

This poisoning is from a bite by a black widow spider (Latrodectus mactans).

The venom of the black widow spider contains neurotoxins that make people sick.

Black widows are found throughout the U.S., but predominantly in the South and West. They are usually found in barns, sheds, stone walls, fences, woodpiles, porch furniture, and other outdoor structures.

Review Date: 02/13/2006
Reviewed By: Stephen C Acosta, MD, Department of Emergency Medicine, Portland VA MedicalCenter, Portland, OR. Review provided by VeriMed Healthcare Network.