OverviewThe gram stain procedure is a method of staining microorganisms on a slide using crystal violet to be viewed later under a microscope.
Review Date 12/2/2014
Updated by: Irina Burd, MD, PhD, Assistant Professor of Gynecology and Obstetrics at Johns Hopkins University School of Medicine, Baltimore, 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.