DRBC Agar (Dichloran Rose Bengal Chloramphenicol) Difco 258710, . Supports good growth of yeasts and molds while inhibiting bacteria and the spreading of rapidly growing molds. DRBC Agar (Dichloran Rose Bengal Chloramphenicol) Difco 258710 - buy online through Voigt Global Distribution, your dealer distributor for all BBL DIFCO BD Microbiology products.