Slime production by Staphylococcus epidermidis on Congo Red agar; demonstrated by black colored#colonies. Slime production is one of the most important #virulence factors produced by Coagulase negative Staphylococci. 

The colonies of slime non-producing strains remain pink to red.

This photo was taken from our site #microbeworld.org.Submitted by: vijendrak Thanks to the author(s): Vijendra K, Osmania Medical College, Hyderabad, India

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