Ovine Johne's disease (OJD) was diagnosed in a commercial fine wool merino flock in eastern Victoria in December 1995. Prior to this, there was no evidence indicating that sheep flocks in Victoria were infected. This paper presents an account of the tracing and investigation activities undertaken as a result of this diagnosis, and the disease control program which was initiated in partnership with the Victorian sheep industry in December 1996. Information on the number and outcomes of flock disease investigations is presented, and progress with the Victorian OJD control program discussed.