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How many poisonous spiders are in the world?


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November 28, 2010 9:40AM

Most spiders have a venomous bite. Each species has different toxins within the venoms. Some of those toxins are dangerous or fatal to man but not all.

The bite of a black widow, for example, can cause heavy abdominal cramping and intense pain. The brown recluse spider bite causes a puss filled lesion, where the victim risks amputation or infection antivenin is not administered quickly. The hobo spider bite is believed to have similar necrotic effects.

Venom is produced by specialized glands in the spider's body. In most cases, spiders use the chemical properties of the venom to liquefy the insides of their prey, making them easier to digest.