Clinical Microbiology


CHROMagar™ Y.enterocolitica

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Packaging / Colonies appearance

For detection and differentiation of pathogenic Yersinia enterocolitica  

Pathogenic Y.enterocolitica
→ mauve
Non pathogenic Y.enterocolitica and Background flora (Citrobacter, Enterobacter, Aeromonas etc) 
→ Metallic blue, inhibited or limited growth in metallic blue colour

Order References 

Please use these references when
contacting your local distributor:

CHROMagarTM Y.enterocolitica:

5000 mL pack .............................................. YE492
Product = powder base YE492(B) + supplement YE492(S)
To download the certificate of analysis, please indicate your lot number below :


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 CHROMagarTM 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 CHROMagarTM 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 CHROMagarTM 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.

    Medium Description

CHROMagar™, Rambach™, AquaCHROM™ are trademarks created by Dr. A. Rambach.
All pictures of our products are CHROMagar property and should not be used without our acceptance.

      Last Update: 04-July-2019

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.

Comparison of CHROMagar Yersinia and CIN Agar media for isolation of potentially virulent Yersinia enterocolitica in stools


Nicolas Renaud,a Laetitia Lecci,a René J. Courcol,a,b Michel Simonet,a,b Olivier Gaillota Lille University Medical Centera and INSERM U1019,b Lille, France Journal of Clinical Microbiology p. 1184–1187 April 2013 Volume 51 Number 4 COMPLETE ARTICLE

Comparison of CHROMagar Yersinia and CIN Agar media for isolation of potentially virulent Yersinia enterocolitica in stools


Nicolas RENAUD et al. Microbiology Laboratory, Lille University Hospital, LILLE, France ASM Poster 2012

Prevalence of human pathogenic Yersinia enterocolitica in Swedish pig farms


Therese Rasback, Thomas Rosendal, Michael Stampe, Axel Sanno, Anna Aspan, Katarina Jarnevi and Elina Tast Lahti Acta Veterinaria Scandinavica 2018
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