DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Foreign body in foot. View of the sole of a foot infected around the site of foreign body entry. Such injuries are commonly caused by stepping on something sharp, such as broken glass or splintered wood. The object carries bacteria into the skin, where it infects surrounding tissue. If the object is deep, surgery may be necessary to remove it. The major risk is that of tetanus, a disease caused by a bacterium which lives mainly in soil. Tetanus can cause muscle spasms and often death. Most developed countries have a tetanus vaccination program.
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