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Milk test finds BVD antigenAntel BioSystems, Inc., Lansing, Mich., has validated two testing procedures for detecting Bovine Viral Diarrhea (BVD) antigen in DHI milk samples. Following the introduction of milk tests for Johne's disease in 2001, and bovine leukosis in 2004, the new BVD tests will enable veterinarians and producers to identify persistently infected cows without the costs of animal sorting, restraining and sampling associated with traditional blood or ear-notch analysis. The first test is a reverse-transcriptase polymerase chain reaction (RT-PCR) assay designed to detect the presence of virus in bulk tank/group samples. The RT-PCR assay was adapted from published procedures, and is capable of conservatively detecting a single PI cow in bulk tanks/groups containing milk from up to 250 individual cows. The second test AntelBio is making available is an antigen detection ELISA for milk to detect individual PI cows within bulk tanks/groups that have tested positive by RT-PCR. The milk ELISA utilized by AntelBio correlated with more than 400 standard ear-notch and/or serum analyses in infected herds. In combination, these testing procedures offer a convenient, cost-effective means of screening dairy herds experiencing, or at high risk of BVD outbreaks. For more information, call 800-631-3519. 2/11/08 Date: 2/15/08
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