Columbia CNA Agar (Colistin and Nalidixic Acid), with 5% sheep blood

Hardy Diagnostics Columbia CNA Agar is recommended for use as a selective growth medium for the isolation and differentiation of gram-positive cocci from clinical and non-clinical specimens which contain mixed flora.

This media is identical to Cat. no. A50, however his product has a Petri plate that features a reduced stacking ring (smoother lid) so that it will work smoothly with automated streaking devices, such as the bioMerieux Previ Isola.
Supplier Amerigo Scientific
Product # GA50
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