Targeted surveillance underway for Johne’s disease in WA cattle
A targeted surveillance program is underway to determine if Johne’s disease (JD) in cattle is present in Western Australia.
The surveillance testing is being carried out by the Department of Primary Industries and Regional Development (DPIRD) on behalf of the Cattle Industry Funding Scheme (CIFS), which is funding the program.
The program is designed to scientifically determine the JD status of beef and dairy herds across the state and is needed in order to inform WA industry’s decision-making on whether to continue to regulate JD in cattle in WA in the future, including whether to maintain border controls.
Under the risk-based surveillance program, WA properties were invited to undertake testing on the basis of having imported cattle since 2005 from the eastern states where the prevalence of JD in cattle is higher than in WA.
To date, DPIRD has carried out sampling on 76 of 100 targeted properties.
Testing has been completed for 62 properties, and all have received negative results for JD in their cattle herds.
The new national arrangements for JD categorised all forms of JD together, so WA is no longer considered ‘free’ of JD because ovine Johne’s disease (OJD – or ‘sheep strain’) is present in the state’s sheep population.
Testing under the targeted surveillance program has found no evidence of either sheep (S)-strain or cattle (C)-strain of JD in the 62 WA cattle herds where test results have been received to date.
An additional 77 WA cattle properties have completed voluntary testing for their Johne’s Beef Assurance Score (J-BAS) and have also tested negative for JD.
The Cattle Industry Funding Scheme will keep industry informed about the progress of the surveillance program and consult with industry if any significant detections occurred prior to deciding on a course of action.
The committee and department have issued a joint industry update with further details about the surveillance program.
| Commencement date | September 2017 |
| Number of properties sampled to date | 76 |
| Number of results received | 62 |
| Number of properties with C- or S-strain detected in cattle herd | 0 |
| Number of properties still to be sampled | 24 |
| Expected date for testing completion | Late 2018 |