Dr. Alain Rambach


Graduated from the École Polytechnique, Dr. Alain Rambach joined the Institut Pasteur in 1967 where he worked with Professor François Jacob, Nobel Prize winner in physiology and medicine.

He defended his thesis in bacterial genetics and then broached the very controversial subject of DNA manipulation as a pioneer.

After a post-doctorate at Stanford University in California, he returned to the Institut Pasteur in 1976 to continue his research in the field of genetic engineering.

In 1978, in a laboratory near the Institut Pasteur, he met Dr. Jean Buissière, who specializes in the medical diagnosis of infections.

It was Dr. Buissière who taught Dr. Rambach the fundamental idea that by characterizing the enzymatic equipment of a bacterium by tests in tubes or wells, it is possible to deduce the identification.

DR Alain Rambach


To use this principle, but a day earlier, from the stage of isolation on a Petri dish, Dr. Alain Rambach then invented, and patented in 1979, a culture medium to differentiate Escherichia coli bacteria by staining colonies, by incorporating a specific chromogenic substrate into the agar medium.


Later, in 1989, he successfully commercialized the first chromogenic culture medium accepted by the market, Rambach Agar for Salmonella.


In 1993, he founded the company CHROMagar™ to continue developing new chromogenic culture media to detect various microorganisms and innovate in the field of bacterial diagnostics.


In 1994, he developed the first CHROMagar™ bichromogenic medium: by combining two chromogens, he obtained a range of colony colorations, and the medium can differentiate a whole series of microorganisms on a single Petri dish.


On the same principle, the CHROMagar™ Candida medium is created to identify different species of yeast.

DR Alain Rambach


Until 2015, Dr. Alain Rambach will continue to play a role in the management, research, and development of CHROMagar products.


Based on its teaching, CHROMagar still claims today an ongoing commitment to innovation and quality.


CHROMagar mission remains unchanged: developping rapid and efficient detection and identification solutions to meet the major challenges of microbial infection control.

DR Alain Rambach