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Bulk Milk Testing
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Bulk Milk Testing
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Systematic BVDV Management for beef herds
BVDV Sale Animal Testing
BVDV Show Testing

 

 
 
 
 
This powerful new assay is designed to provide producers and veterinarians with a simple “average” BVDV antibody level assessment for a population of lactating cows utilizing a bulk milk tank (BMT) sample.

Seeking a tool to estimate within-herd exposure to BVDV at a reduced cost and with simpler sampling procedures than traditional serum based serological screening, the Livestock Improvement Corporation in New Zealand, validated the IDEXX HerdChek BVDV Antibody assay for use on BMT samples. The assay compares the BMT sample’s antibody level against a known positive, resulting in a “sample to positive control” or S/P ratio.
 
Utilizing a single BMT sample, the assay has been shown capable of providing a reasonable estimate of milking herd sero-prevalence and is highly sensitive for the detection of active or very recent exposure of the milking herd to Persistently Infected (PI) animals. With a single sample, veterinarians can tailor their control strategies to most cost effectively further investigate and manage BVDV. 
 
      

     
 
The BMT antibody level in a dairy herd will not fluctuate significantly unless either a PI has recently exposed the herd or there has been an addition of a group of either strongly antibody free or antibody positive animals between sampling events.  We are still investigating the impact of Pestigard vaccination upon BMT antibody results, the effect is expected to be transient.

Once a milking herd’s baseline S/P ratio has been established, regular BMT sampling can provide a reference for measuring the success of control strategies and as an ongoing monitoring tool for reintroduction of the virus to the milking herd.  

 
If an individual dairy’s S/P ratio increases significantly between samplings, it is worth investigating.

 
BVDV Lab contacts:

Dr. Enoch Bergman DVM

 

 

Mobile: 0427 716 907

Email: enoch@swansvet.com

Sharon Slater BSc, Lab Manager
Lauren Norris, Assistant Lab Manager

 

 

Ph: 08 9071 5777

Email: lab@swansvet.com 

 
 
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