A Wisconsin man has been bitten by snakes hundreds of times, and scientists are studying his blood to treat snakebite.

Most spider bites cause local pain, redness and swelling. It's much like a bee sting reaction. A few spiders (such as the Black Widow) can cause a more severe reaction. Helpful if spider seen on the ...

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head lice. Since children spend more time close together in classrooms, during sports, and on the playground, this time of year often sees a rise in lice cases. Head lice aren’t dangerous, but they ...

While it's sucking blood, some of its secretions get mixed in. Only female mosquitoes bite. They need a blood meal to produce eggs. The female may bite 20 times before she finds a small blood vessel.