Gram Stain Control Slide provides two air-dried and methanol-fixed droplets within two etched circles.
The circle nearest the label contains a droplet of Gram-positive Staphylococcus aureus derived from ATCC® 25923™*.
The circle farthest from the label contains a droplet of a Gram-negative Escherichia coli derived from ATCC® 25922™*.
Stains: Gram stain