Growing on Columbia CNA Agar
Only Gram-positive bacteria grow on
Columbia CNA agar. (Gram-negative bacteria are inhibited by the colistin and nalidixic
acid added to the agar.) Staphylococcus epidermidis does not normally
Microbiology Laboratory Manual by Gary E. Kaiser, PhD, Professor of Microbiology
is licensed under a Creative Commons Attribution 4.0 International License.
Last updated: August, 2017