Recently, different chromogenic culture media capable of distinguishing C. albicans from other yeasts of clinical interest have been commercialized. Such media are based on the color alteration yielded by the colonies, which is measured by using indicators of pH and fermentation of specific compounds or chromogenic substrates for presumptive identification of C. albicans, C. tropicalis and C. krusei. β-glucosaminidase is used as substrate and yeasts are differentiated according to the morphology and color of colonies.