Gram stain demonstration slide, 400x 1
A slide demonstrating the gram stain. On the slide are two species of bacteria, one of which is a gram positive coccus (Staphylococcus aureus, stained dark purple) and the other a gram-negative bacillus (Escherichia coli, stained pink). Seen at approximately 400x magnification.
Copyright © 2011 Marc Perkins