Ovine Johne's disease in Australia - the first 20 years

Objective: To review the history of ovine Johne's disease in Australia. Procedure Relevant publications and reports were identified and reviewed to document the spread of ovine Johne's disease (OJD) from 1980 until the end of 2000, as well as the response of industry and government to the spread of this disease. Results OJD was first diagnosed in the central tablelands region. of New South Wales in 1980. Since then it has spread, either from the initial focus or through separate introductions so that by December 2000 a total of 823 infected flocks had been identified. Cases have been confirmed in New South Wales, Victoria, the Australian Capital Territory, on Flinders Island in Tasmania, on Kangaroo Island in South Australia and in Western Australia. In early 1999, agreement, was reached to fund and implement a 6-year, $40 million National, OJD Control and Evaluation Program (NOJDP). This program is jointly funded by the sheep industries (national and state), and Commonwealth and State governments, and is managed by Animal Health Australia. Conclusion A national program is. now in place lo support the control of OJD and research lo determine the feasibility and cast-effectiveness of eradication. The development of new diagnostic techniques, such as abattoir surveillance and pooled faecal culture, provide opportunities to refine surveillance strategies and to define better the distribution and prevalence. of this disease, as required by the national program.. Effective control measures, combined with quality surveillance data, will enable informed decision making for the future national management of OJD.