mEI (Membrane-Enterococcus Indoxyl-β-D-Glucoside) Agar Môi trường vi sinh mEI (Membrane-Enterococcus Indoxyl-β-D-Glucoside) Agar mEI (Membrane-Enterococcus Indoxyl-β-D-Glucoside) Agar Selective chromogenic medium used for the detection and enumeration of Enterococci in water