Cetrimide Agar is used in the isolation and identification of Pseudomonas aeruginosa in a laboratory setting. Cetrimide Agar is not intended for use in the diagnosis of disease or other conditions in humans.
Pseudomonas aeruginosa produces a number of water-soluble pigments, including the yellow-green or yellow-brown fluorescent pigment pyoverdin (fluorescein). When pyoverdin combines with the blue water-soluble pigment pyocyanin, the bright green color characteristic of Pseudomonas aeruginosa is created. Agar containing Cetrimide have been used successfully to isolate Pseudomonas aeruginosa from contaminated specimens.
King, Ward, and Raney developed Medium A (Tech Agar) to enhance the production of pyocyanin in Pseudomonas spp. Cetrimide Agar is prepared according to this formula with the addition of Cetrimide. Cetrimide Agar is recommended in the examination of food and in United States Pharmacopeia (USP XXIII) for use in Microbial Limit Test.
|Enzymatic Digest of Gelatin||20 g|
|Magnesium Chloride||1.4 g|
|Potassium Chloride||10 g|
|Cetrimide (Cetyltrimethylammonium Bromide)||0.3 g|
Final pH: 7.2 ± 0.2 at 25°C
Formula may be adjusted and/or supplemented as required to meet performance specifications.
Supplement / Liter
Glycerol, 10 mL
|Product #||Product Description|
|7222A||Cetrimide Agar, 500 g|
|7222T||Cetrimide Agar, 5 kg|