Staphylococcus Medium 110 Difco 229730, 500g. Isolation and differentiation of pathogenic strains of Staphylococcus based on mannitol fermentation, pigment formation and gelatinase activity. Staphylococcus Medium 110 Difco 229730 - buy online through Voigt Global Distribution, your dealer distributor for all BBL DIFCO BD Microbiology products.