Middlebrook 7H10 Agar BD Difco™ 500 g. Used for the isolation, cultivation and susceptibility testing of mycobacteria. Middlebrook OADC Enrichment (Cat. Nos. 211886 or 212240 or 212351) and Glycerol must be added; the complete Prepared Plated Medium (with OADC) is available under Cat. No. 254520, Middlebrook and Cohn 7H10 Agar.