Only Gram-positive bacteria grow on Columbia CNA agar. (Gram-negative bacteria are inhibited by the colistin and nalidixic acid added to the agar.) Micrococcus luteus produces a yellow, water insoluble pigment.
Photograph of Micrococcus luteus growing on Columbia CNA agar.jpg by Gary E. Kaiser, Ph.D.
Professor of Microbiology, The Community College of Baltimore County, Catonsville Campus
This work is licensed under a Creative Commons Attribution 4.0 International License.
Based on a work at http://faculty.ccbcmd.edu/~gkaiser/index.html.
Last updated: June, 2018
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