Candida Agar is used for isolating and differentiating Candida albicans. Aniline blue is a fluorescent indicator, metabolized by C. albicans to produce a fluorescent moiety that can be easily detected under UV light. Some strains of C. parapsilosis , C. krusei and C. pulcherrima may give slight fluorescence and that may be distinguished from C. albicans by germ tube formation.