OJD Prevalence Areas in Australia
Prevalence Areas, which form a key component of the Assurance Based Credit Scheme, have been defined using the abattoir surveillance data collected by each state and published in surveillance reports over a number of years. Each point allocated under the ABC Scheme represents a fourfold decrease in likelihood of infection being acquired from that particular line of sheep, that means the more points a line of sheep has, the lower the risk they represent.
With the changes that were implemented in March 2008 there are only three OJD Prevalence Areas in Australia. These are:
- Low Prevalence Area (LPA)
- Medium Prevalence Area (MPA)
- High Prevalence Area (HPA)
Monitoring of sheep for OJD and other endemic conditions is continuing nationally with AQIS meat inspectors collecting the data. In line with nationally agreed protocols, the surveillance data is analysed annually to provide additional information on area prevalence.
To claim a particular Prevalence Area status, a jurisdiction has to consistently demonstrate that the flock prevalence is below the maximum cut off for that Prevalence Area at the 95% confidence limit for two consecutive years. View the current cut off limits.
You can view maps of the new OJD Prevalence areas area here:
OJD Prevalence Area Map - Australia (663 KB)
OJD Prevalence Area Map - NSW (698 KB)
OJD Prevalence Area Map - VIC (708 KB)
Currently there are no Free Zones for OJD in Australia.
For more information on OJD Prevalence Areas contact your State Coordinator.
Page Updated: 15 January 2010