Our Chromogenic Media Experience For Your Microbial Testing


CHROMagar, pioneer since 1979

Inventor and Pioneer since 1979 in chromogenic media technology, Dr Rambach founded CHROMagar in 1993 which provides innovative chromogenic culture media solutions, designed to improve and simplify traditional culture techniques.

Established in the heart of Paris (France), not far from the famous Pasteur Institute where Dr. Rambach began his research career, CHROMagar is at the cutting edge of a diagnostic field that developed out of Dr. Rambach’s pioneering research in the late 1970’s.

Today, CHROMagar supplies the widest range of chromogenic culture media available, covering applications in clinical bacteriology, industrial microbiology, quality control for food and beverage industries, water testing and environmental monitoring... among other fields. These media allow for a quicker and simpler detection of key clinical and food-borne pathogens

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CHROMagar™ B.cereus

Photos CHROMagar™ B.cereus

For detection and differentiation of Bacillus cereus group

Typical Appearance of microrganisms

Bacillus cereus → blue with white halo  
Other Bacillus → blue, colourless or inhibited
Gram negative bacteria → inhibited
Yeast and moulds → inhibited


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CHROMagar™ C.difficile

Photos CHROMagar™ C.difficile

For detection of Clostridium difficile 

Typical Appearance of microrganisms

C.difficile → colourless and fluorescent under UV light at 365 nm
Other bacteria → colourless, no fluorescent or inhibited

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US customers please follow this link
DRG International Inc


Complete news list


NEW: CHROMagar C.difficile


CHROMagar has developed an outstanding medium for the detection of Clostridium difficile    


Important: New Instructions for Use


CHROMagar start the year with new Instructions for Use


Interactive CHROMagar General Brochure


Discover our wide range of products

Awarded CHROMagar Undergraduate Research Fellowship!


2/25/2013 Marian University Student awarded CHROMagar Undergraduate Research Fellowship


Know more here...

Where can i find my CHROMagar distributor?


CHROMagar dedicated a page to locate your distributor in more than 80 countries in the world

E.sakazakii agar available at CHROMagar !


E.sakazakii agar is available in the CHROMagar product range for E.sakazakii detection (Cronobacter spp.) following the ISO/TS 22964 standard

GBS Screening : Use CHROMagar StrepB!


Bring colour to your GBS Screening!
CHROMagar StrepB

NEW: Detection of Bacillus Cereus group: CHROMagar B. cereus medium !


CHROMagar developed a new product for the detection and enumeration of Bacillus cereus group in food and environmental samples...


Heard From scientific community in ASM General Meeting!


CHROMagar got involved in many scientific posters during ASM General Meeting posters presentation. Find out online these publications and discover the methods and performance results they got through their studies...

CHROMagar Technology in the hands of Research Students at Marian University, USA!


Students from Mc Nair Marian University, guided by their dynamic Program Director Dr Susan Bornstein enjoy CHROMagar chromogenic culture media for their workshops and research programs.

Salmonella kentucky detected by CHROMagar Salmonella Plus


Recent outbreaks involving the multi drug resistant Salmonella kentucky were observed worldwide...

Product Leaflets !!


Download our product leaflets
from our product pages

Non-Motile Salmonella: Emerging challenge for the food industry


The food industry has observed an increasing and alarming number of cases of food contamination with non-motile Salmonella strains.

Use CHROMagar STEC to screen E.coli O104 !


The harmful E.coli O104 recently detected in Germany was screened on worldwide premiere
CHROMagarTM STEC chromogenic medium in 24h incubation time! Read More.....

NEW: CHROMagar C.difficile


CHROMagar has developed an outstanding medium for the detection of Clostridium difficile