Definition: A substance used to kill bacteria. Antibiotic treatments can be systemic, as in oral medications, or topical, such as cream or ointment. In regards to acne, they are often used to reduce the amount of acne-causing bacteria on the skin.
Antibiotic
By Angela Palmer, About.com Guide
Updated: September 21, 2007
About.com Health's Disease and Condition content is reviewed by the Medical Review Board
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