It is caused by a bacteria called Mycobacterium avium subspecies paratuberculosis (or MAP).
A case of Johne’s represents only the “tip of the iceberg”. In the typical herd, for every animal showing signs, many other cattle are in the earlier stages of the disease. It is estimated that for every 1 obvious clinical case, 15-25 other animals are likely infected.
Johne’s causes huge economic losses to the New Zealand Dairy industry, estimated to be between $40 million to $90 million every year in lost milk production and poor calving rates. At an individual herd level, the economic impact of Johne’s disease occurs in a slow, unapparent manner over several years.
Johne's disease leads to:
The dynamics of Johne’s Disease are complex, but progress is possible with the right approach.
At Franklin Vets, we can assist in the diagnosis of Johne's disease, but more importantly, we can help set up a Johne’s management and control plan specific to your farm to help minimise losses.
We can also discuss options you may have seen for Johne’s testing, such as through milk at the time of herd testing and can consider results with you.
For more information on Johne’s disease management, please contact your local Franklin Vets Clinic.