University of Illinois Extension

Illini DairyNet Papers

Bacteria Counts in Raw Milk
Richard L. Wallace
07/28/2008

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Bacterial contamination of raw milk can generally occur from three main sources; within the udder, outside the udder, and from the surface of equipment used for milk handling and storage.

The bacteriological tests used most often are the Standard Plate Count (SPC), the Preliminary Incubation Count (PI), the Lab Pasteurization Count (LPC) and the Coliform Count.

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