Figure 6.8 Colonies on Membrane Filters. Membrane-filtered samples grown on a variety of media.(a) Standard nutrient media for a total acterial count. An indicator colors colonies red for easy counting. (b) Fecal coliform medium for detecting fecal coliforms that form blue coloni c)m-Endo agar for detecting E. coli and other coliforms that produce colonies with a green sheen. (d) Wort agar for the culture of yeasts and me Membrane filter removed an placed in plate Water sample filtered containing the Membrane filter through membrane appropriate Incubation on a filter suppo filter(0. 45 um) medium for 24 hours )alter Figure 6.7 The Membrane Filtration Procedure