Figure 2: Effective concentrations (MBC, MIC and MSC) observed for R. picketti BP20 incubated in the presence of drilling fluids: Diesel based Fluid (DF), Diesel Invert Emulsion (DIE), Diesel Direct Emulsion (DDE), Low Aromatic Fluid (LAF), Low Aromatic Invert Emulsion (LAIE) and Low Aromatic Direct Emulsion (LADE), and co-substrate: glucose (A) and sodium pyruvate (B).