The Cetrimide Test is a biochemical and microbiological test that is used for the selective isolation and identification of Pseudomonas aeruginosa. It is mainly applied for the examination of water samples, clinical specimens and pharmaceutical products. It is performed using cetrimide agar which is a selective solid culture medium. The medium contains cetrimide (cetyltrimethylammonium bromide) which is a quaternary ammonium compound having detergent property.
The principle of cetrimide test is based on the ability of Pseudomonas aeruginosa to resist the inhibitory action of cetrimide. Most of the other bacteria are inhibited because…
