The gram stain procedure is a method of staining microorganisms on a slide using crystal violet to be viewed later under a microscope.
Update Date 11/24/2014
Updated by: Daniel Levy, MD, PhD, Infectious Diseases, Lutherville Personal Physicians, Lutherville, MD. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.