Colorex Y.enterocolitica

Focus on Yersinia Enterocolitica

Among the Yersinia genus, Yersinia enterocolitica is one of the most common food borne pathogen. In several countries, Y.enterocolitica has eclipsed Shigella and approaches Salmonella and Campylobacter as the predominant cause of acute bacterial gastroenteritis. Its ability to grow at refrigeration temperature makes it an increasing concern in terms of food safety. This germ most commonly affects young individuals. However, only a few strains of Y.enterocolitica cause illness in humans. Those pathogenic Y.enterocolitica strains belong to biotypes 1B, 2, 3, 4, and 5, whereas biotype 1A strains are non-pathogenic and widespread in the environment. The major animal Y.enterocolitica reservoir causing illnesses are pigs.


Medium Performance


1. Clear differentiation of Yersinia among background flora

Background flora, such as Citrobacter, often has a Yersinia-like red aspect on CIN agar which generate a heavy routine workload on false positive results. Thanks to Colorex Y.enterocolitica, this unnecessary workload will be eliminated as only pathogenic Yersinia enterocolitica colonies will grow mauve.

2. Colourful differentiation of pathogenic among non pathogenic Yersinia enterocolitica. In traditional culture media like CIN agar, pathogenic and non-pathogenic biotypes have the same aspect. On Colorex Y.enterocolitica, the pathogenic biotypes grow in a distinctive mauve colour, differentiated at a glance, from the non pathogenic which will grow metallic blue.



Background flora is dramatically reduced on Colorex Y.enterocolitica allowing an easy reading of the plates. The laboratory will concentrate its efforts and resources only on suspect colonies that have a real potential of pathogenicity.