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Many creatures, including humans, bite when frightened or provoked. Bites may cause injuries ranging from superficial scratches to extensive wounds and often become infected with bacteria from the mouth of the biting creature.
Certain animals can inject venom (poison) through mouthparts or a stinger. These venoms range in toxicity from mild to life threatening. Even mildly toxic venoms may cause serious allergic reactions.
Last full review/revision February 2003
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