Southern Counties DHIA offers PCR-based mastitis DNA testing on milk samples.

We use Lancaster DHIA to perform DNA testing on milk samples. Analysis is available on pen samples as well as individual cow samples. It can be done monthly or on an as needed basis.

The samples are collected at the dairy by your regular tester then delivered to the lab in Shafter. They are labeled and packaged then shipped to Lancaster DHIA.

The results are sent by email or regular mail.

Contact the SCDHIA office to order this service. 661-746- 2088 or 909-597- 2111

The following information is an excerpt from

What is PCR-based Mastitis DNA Testing? PCR is a technique to amplify a single or few copies of a piece of DNA across several orders of magnitude, generating millions or more copies of a particular DNA sequence.

The real-time PCR-based mastitis assay is a revolutionary method for cow mastitis testing. The assay can identify and quantify 15 major mastitis-causing species or groups plus Staphylococcal β-lactamase penicillin resistance gene.

What are the advantages?

Why use PCR-based Mastitis testing over the standard culture?

In approximately 25–40% of bovine milk samples taken from animals with clinical mastitis, no bacterial growth can be detected with conventional culturing.

PCR-based mastitis DNA testing leads to more effective treatments by:

For further information on PCR based DNA analysis use the following link to access the Lancaster DHIA website: