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Diagnostic Testing of Cow Mastitis
Time:
2025-06-10
Bovine mastitis is one of the most common diseases of the dairy herd. It has a great impact on the health of the animals and especially on the economy of the farm and the dairy sector.
It is vital to test cows that appear to have mastitis. Taking a milk sample and submitting it for testing is recommended by veterinary medicine experts.
Recording the results of tests is important to identify trends within individual beef and dairy farms, as well as wider trends within the dairy industry.
There are several different types of tests for mastitis. The first test will be to determine if mastitis is present.
The California Mastitis Test can clearly show mastitis. It can be performed by farmers at home and doesn’t require the use of a lab. This test measures leucocytes through viscosity and is great for showing the severity of mastitis present.
Another test often used for determining if mastitis is present requires sending a sample to a lab and is called the SCC test. This test measures the amount of SCC’s in a milliliter of milk.
SCC stands for somatic cell counts and the test examines the number of white blood cells present.
- SCC’s signaling infection can be as little as 100k cells per ml.
- SCCs that have greater than 280k per ml have around an 85 percent infection chance.
It should be noted the SCC test and the California Mastitis Test do not tell you what is causing the mastitis. For that information, you will need another test.
There are a few different options that will show you the cause of the infection.
A sample of milk can be sent to a lab to perform a bacterial culture from the area(s) that show signs of infection. While this is a reliable way of determining the cause, it can take one to two weeks to get results which may be too long.
Another test is the ELISA test, which will show the type of pathogen but will not let you know if mastitis is present.
The Multiplex PCR test is the gold standard capable of identifying mastitis, the pathogen behind it, and is both reliable and fast. This type of test also allows for fresh, preserved, or frozen milk testing.
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