Minimum of 6 ml milk each sample in a tube 1/4 to 3/4 full. Freeze samples immediately after collection. Samples must remain cold, preferably frozen. Refer to Best Practice: Milk Samples (link) for detailed instructions on how to collect a bulk milk sample.
This test is used to monitor environmental bacteria in bulk milk, which when elevated indicate a failure of hygiene or cleaning in the milking parlor.
Results reported: cfu/ml Coliform, Environmental Streps
Sterile tube (2oz flip-top tubes preferred)