Skip navigation

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

National Library of Medicine

The navigation menu has been collapsed.

Español

You Are Here:

Home →

Medical Encyclopedia →

Gram stain of tissue biopsy

URL of this page: //medlineplus.gov/ency/imagepages/9353.htm

Gram stain of tissue biopsy

Overview

The gram stain procedure is a method of staining microorganisms on a slide using crystal violet to be viewed later under a microscope.

Review Date 3/16/2024

Updated by: Jatin M. Vyas, MD, PhD, Associate Professor in Medicine, Harvard Medical School; Associate in Medicine, Division of Infectious Disease, Department of Medicine, Massachusetts General Hospital, Boston, MA. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.