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Thermo Scientific™ Columbia CNA Agar Base (Dehydrated)

Catalog No. R452962
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R452962 500 g
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Catalog No. R452962 Supplier Thermo Scientific™ Supplier No. R452962
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Description

Selectively isolate gram positive cocci using Columbia CNA Agar Base.

Selectively isolate gram-positive cocci using Thermo Scientific™ Remel™ Columbia CNA Agar Base (Dehydrated). Columbia Agar Base was first described by Ellner, Stoessel, Drakeford, and Vasi in 1966 as an improved agar base1 which was capable of growing fastidious and nonfastidious organisms from clinical specimens. Ellner et al. incorporated colistin and nalidixic acid in the base to produce a selective medium for isolating gram-positive organisms (e.g., streptococci, staphylococci) from specimens containing mixed flora.

Carry out primary selective isolation of gram-positive cocci using Columbia CNA Agar Base.

  • Selective: Nalidixic acid and colistin inhibit most gram-negative bacilli.
  • Ease of Identification: Use of sheep blood enables the demonstration of hemolytic activity.

This medium contains peptones which supply growth factors such as nitrogen, carbon, vitamins, and trace elements essential for bacterial growth. Beef extract and corn starch serve as sources of energy and yeast extract supplies B-complex vitamins. Colistin and nalidixic acid inhibit most gram-negative bacilli. Sheep blood provides the X factor (hemin) necessary for the growth of many bacteria and enables demonstration of hemolytic activity.

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Remel™ and Oxoid™ products are now part of the Thermo Scientific brand.

TRUSTED_SUSTAINABILITY

Specifications

Description Columbia CNA Agar Base
Form Powder
Product Type Agar
Quantity 500 g

For Laboratory Use Only

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