Chromogenic technology

热固化(法)E.coli)was invented and patented by Dr Alain Rambach in1979。The introduction of this medium triggered arevolution in microbial diagnosis driven by the introduction of awhole range of media for the detection of key clinical&food borne pathogens。


How does Chromogenic Culture Media technology work? 


The power of chromogenic technology is the combination of the detection of precise enzyme activity and localized staining precipitating in the colony,allowing an easy differentation of microorganisms thanks to the coloration of grown bacteria。


This technology is based on soluble colorless molecule called chromogen,composed of a substrate,targeting a specific enzymatic activity and a chromophore。


When the target organism’s enzyme cleaves the colorless chromogenic conjugate,the chromophore is released。Inits unconjugated form,the chromophore exhibits its distinctive colorand,due to reduced solubility,forms a precipitate。


The result is a very specific&distinctive color-based differentiation,which is clearly distinguishable to the naked eye under normal lighting conditions。

What are the advantages of this method?

Chromogenic technology is a powerful tool for detecting targeted microorganisms even in mixed culture conditions,allowing the user to:

-Phenotypic detection,i.e.on the basis of the pattern actually expressed by the microorganism,

-Facilitate the final identification(no subculture,fewer colonies to test),

-A faster and more efficient result。

For the laboratory technician:Easy to read at a glance!

-The result is very specific and distinctive in mixed culture,


-Naked eyes reading of the plates thanks to the unique colors。With this technique,colonies of specific microorganisms can be recognized by their colorat a glance,limiting the risk of misinterpretations。

scale:Cost savings&fast method!

-It allows for easy differentiation of microorganisms without the complex and costly traditional detection procedures employed in traditional agar testing techniques(No subcultures),

-By saving time and labor,it increases the efficiency of laboratory testing,

-By shortening the timeframe for identifying pathogens,it helps to prevent the spread of infections。

microbiologist hand cultivating a petri dish whit inoculation loops,beside a microscope and at background tubes and tools of laboratory/lab technician hand planting a petri dish

Why using CHROMagar™,™产品?


CHROMagar™,™supplies the widest range of dehydrated chromogenic culture media designed to target specific need in clinical,water-related,industrial and veterinarian fields!


Our entire range of products is available worldwide through138distributors located on every continent。到locate your local distributor,please visitour Distributor section。


CHROMagar™,™products are sold in dehydrated form in the following sizes:Qsf5L and Qsf25L.QSF stands for“Quantity of powder sufficient for X liters of media”。AQSF5L pack can prepare approximately250plates of media。Bulk sizes are also available upon request。


来自功率,CHROMagar™,™chromogenic plates are easy to prepare。


Just add purified water to the powder,bring to boil,let it cool down and pour!Use the entire pack or,if there is a need for asmaller number of plates just a portion。


If kept under appropriate storage temperatures,CHROMagar™,™powder products have a long shelf life(above18months)。This flexibility is essential to avoid the costly waste resulting from unused plates。


预制介质安装窗™,™可供使用的可供选择的countries under Colorex™,™and RambaCHROM™,™trademarks。