• The Importance of SCC

    The Importance of SCC

     

    Somatic cell count (SCC) data can be used as a good indication of health in both individual cow as well as the herd.


    SCC monitoring is important because as the number of somatic cells increases, milk production yields decline, mainly due to damage to the tissue in the udder caused by pathogens and the toxins they produce. With a risk of loss of production, cost of treatment or replacement and missed premiums, SCC monitoring should be an integral part of your herd management.


    The question is, “what exactly can we see in the numbers?” It’s important to keep track of the counts for individual cows and the aggregate SCC from strings or bulk tanks. We know as the SCC increases over 200,000 cells/ml it suggests that there could be a subclinical issue.


    On the other scale, a very low SCC could indicate the cow is not producing enough white blood cells to provide protection against bacterial infection, therefore it is susceptible to clinical mastitis. But this argument does not always hold true. There is a need to look at the numbers as a management tool.


    As you begin to accumulate an SCC history of your herd, you will be able to pay attention to trends which will aid in reacting to treatments:


    Factor

    Increase / Decrease SCC

    Additional Information

    Bacteria infection

    Increase

    Increase depends on severity of infection

    Stress

    Variable

    May increase depending on factor

    Lactation

    Increase after calving

    Will come down after five days if the cow was healthy before

    Duration between milking

    Variable

    May increase with shorter intervals (stress)

    Bulk tank SCC

    Variable

    Will fluctuate more with smaller herds, less with dilution

    Sample to sample

    Variable

    Sampling will fluctuate results

    Sample methods

    Variable

    Bad techniques can alter results

     
    Note: It is important to collect, store, and analyze milk samples in an appropriate manner. Sampling at the very beginning or end will have an increased concentration of cells. It is advised to strip the cow a few times prior to taken a sample if not milking. Samples taken away from the wall and top of the storage container is recommended as proteins and cells tend to aggregate in these areas.
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