NewsVolume Number April 1, 2019
Jean DurocherM.Sc., D.M.V.

A change in the billing process for LEUKOSIS testing on milk samples

Changement au processus de facturation pour les tests de LEUCOSE dans le lait

Testing a cow’s milk for LEUKOSIS can be done in two ways:

  1. on a milk recording sample
  2. a milk sample taken directly from the quarter

Obviously, many producers opt for the milk recording sample: “Why not take advantage of the opportunity to test for LEUKOSIS on a sample that has already been taken for milk recording.” 

A cow’s milk recording sample invariably contains a small quantity of milk from the previous cow in the milking order. The milk comes from the milking equipment and the samplers used for milk recording. Milk carry-over is a long-known phenomenon, but it has been found to have no effect on the regular milk test parameters. Nevertheless, it must be taken into account when interpreting the LEUKOSIS analysis. This is why a “possible carry-over” mention is associated with some test results.


Until now, milk recording samples identified as having a “Carry-over risk” were not billed to the client.

As of April 2, 2019, milk recording samples identified as having a “Carry-over risk” will be billed, BUT clients will have the opportunity to confirm a cow’s status at no additional cost by taking a second sample directly from the cow’s quarter. This second analysis will only be free of charge if the second sample is taken directly from the quarter within 180 days of the first test.

This new billing process conforms to the principle of paying only once when a second analysis is required to confirm the test result.

As is the case for all samples taken directly from the quarter, producers must use the sampling kit that is provided free of charge by their technicians.

Samples    Enveloppes

There is no need to indicate that the sample is for a retest to benefit from the free service. The system is programmed to recognize this type of situation and the second analysis will not be billed.