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FORT MYERS, Fla.- Antibiotics are powerful medicines that fight bacterial infections. Used properly, antibiotics can save lives. They either kill bacteria or keep them from reproducing. Using antibiotics when you don't need them, or not using them properly, can add to antibiotic resistance. Dr. Lawrence Isaacs, an Emergency Physician at Gulf Coast Medical Center, stopped by the studio to discuss antibiotics and when they can and can not help when we’re ill.