DPC 24, Troubleshooting High Bacteria Counts of Raw Milk

Item #: DPC-024

Published: 2015

Pages: 19

This guideline is designed to help laboratory, field personnel and producers determine the cause and methods of correction of high bacteria counts in raw milk. It names possible causes of high bacteria counts, compares various methods of bacteria testing as tools for determining the causes, and lists practical ways to reduce these causes.

DISCLAIMER: The DPC is not responsible for the use or application of the information provided in this Guideline. It is the responsibility of the user to ensure that the information addresses their needs and that any action taken complies with appropriate regulations and standards.

Table of Contents:
INTRODUCTION
BACTERIA COUNTS
     Bacteria Count Ranges
     Raw Milk Bacteria Count
     Preliminary Incubation Count
     Laboratory Pasteurized or Thermoduric Count
     Coliform Count
     Blood Agar Cultures
     Direct Microscopic Procedures
CAUSES OF HIGH COUNTS
     General
     Cleaning and Sanitizing
     Facilities and Animals
     Cooling
     Other Possible Causes
     Mastitis
    Sampling and Laboratory
TROUBLESHOOTING HIGH COUNTS (VIOLATIVE SAMPLES)
     First High Count
     Second High Count
     Non Milking Time Visit
     If High Count Persists
     Milking Time Inspections
     If Count Remains High
     Erratic Counts
SUMMARY
FACT SHEET: TROUBLESHOOTING BACTERIA COUNTS IN RAW MILK-MECHANICAL  (CIP) WASH SYSTEMS
FACT SHEET: TROUBLESHOOTING BACTERIA COUNTS IN RAW MILK- MANUAL WASH SYSTEMS

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DPC 24, Troubleshooting High Bacteria Counts of Raw Milk

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