Cetrimide Selective Agar/Mannitol Salt Agar
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Thermo Scientific™

Cetrimide Selective Agar/Mannitol Salt Agar

Selectively and differentially isolate and identify Pseudomonas aeruginosa and staphylococci using Cetrimide Selective Agar/Mannitol Salt Agar bi-plate.

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R11024210/Pk.
Catalog number R110242
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10/Pk.

Selectively and differentially isolate and identify Pseudomonas aeruginosa and staphylococci using Thermo Scientific™ Remel™ Cetrimide Selective Agar/Mannitol Salt Agar bi-plate respectively. This phenol red mannitol agar contains 7.5% sodium chloride as a selective agent as reported by Koch in 19421. In 1955, Lowbury described the use of cetrimide in a selective medium for P. aeruginosa2.

P. aeruginosa is a multi-drug resistant pathogen recognized for its ubiquity, its intrinsically advanced antibiotic resistance mechanisms, and its association with serious illnesses – hospital-acquired infections3.

Staphylococci are widespread in nature, although they are mainly found on the skin, skin glands and mucous membranes of mammals and birds. The coagulase-positive species, i.e. Staphylococcus aureus is well documented as a human opportunistic pathogen. The ability to clot plasma continues to be the most widely used and accepted criterion for the identification of pathogenic staphylococci associated with acute infections4.

  • Ease of handling: Read more results from a single patient sample and produce more diagnostic details of pathogenic organisms while reducing storage capacity issues in the incubator with this convenient bi-plate.
  • Easy to differentiate: Mannitol Salt Agar differentiates between coagulase-positive and coagulase-negative staphylococci whereas Cetrimide Selective Agar differentiates P. aeruginosa, which forms fluorescent green colonies, from the other nonfluorescent colonies.
  • Selective: Sodium chloride in the concentration of 7.5% inhibits many bacteria other than staphylococci in Mannitol Salt Agar whereas cetrimide in the medium inhibits bacteria other than P. aeruginosa in Cetrimide Selective Agar.
  • Ready to use: Convenience of a prepared media.
  • Easy to read: Coagulase-positive staphylococci produce yellow colonies and a surrounding yellow medium while coagulase-negative staphylococci produce red colonies and no color change of the phenol red indicator in Mannitol Salt Agar. P. aeruginosa is characterized by production of pyocyanin, a blue-green, water-soluble, non-fluorescent phenazine pigment and no color development on negative test in Cetrimide Selective Agar.

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

Not intended for IVD use.
  1. Koch, F.D. 1942. Zentr. Bakt. Labt. Orig. 149:122.
  2. Lowbury, E.J. and A.G. Collins. 1955. J. Clin. Pathol. 8:47-48.
  3. Balcht, A., Smith, R. 1994. Pseudomonas aeruginosa: Infections and Treatment. Informa Health Care. 83–84.
  4. Murray P. R., Baron J. H., Pfaller M. A., Jorgensen J. H. and Yolken R. H., (Ed.), 2003, Manual of Clinical Microbiology, 8th Ed., American Society for Microbiology, Washington, D.C.
Specifications
DescriptionCetrimide Selective Agar//Mannitol Salt Agar
FormatBiplate
Product TypeAgar
Quantity10/Pk.
Unit SizeEach

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