MEMBRANE FILTER METHOD FOR DETERMINATION OF COLIFORMS IN PASTEURIZED AND CERTIFIED MILK

Abstract

The use of the membrane-filter method for determination of coliform organisms in pasteurized and certified milk permits a more rapid counting of coliform colonies with the elimination of much of the plating procedure used with the conventional determination methods. Results of analysis for coliform content can be preserved on the membranes for future reference. Large quantities of milk can be examined rapidly through the use of the centrifuge in the method outlined. Endo-agar was used in this work as the differential agar medium.