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Black widow spider

Black widow spider

Arthropods, basic features
Arthropods, basic features
Arachnids, basic features
Arachnids, basic features
Black widow spider
Black widow spider

Definition:

The black widow spider (Latrodectus mactans) has a shiny black body with a red hourglass-shape on the belly area. The bite of a black widow spider is poisonous.

Poisonous Ingredient:

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

Where Found:

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

Symptoms:

This first symptom is usually pain similar to a pinprick. This sensation is felt when the bite is actually made. Some people may not feel it. There may be minor swelling and redness.

Fifteen minutes to an hour later, a dull muscle pain spreads from the bite area to the entire body.

  • If the bite is on the upper body, you will usually feel most of the pain in your chest.
  • If the bite is on your lower body, you will usually feel most of the pain in the abdomen.

The following symptoms can also occur:

Pregnant women may have contractions and go into premature labor.


Review Date: 10/29/2007
Reviewed By: Eric Perez, MD, Department of Emergency Medicine, St. Luke's-Roosevelt Hospital Center, New York, NY. Review provided by VeriMed Healthcare Network.

The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed physician should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. Copyright 2002 A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.

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