Investigation of Johne's disease in Tasmanian fallow deer (Dama dama).

In 2012 when many sheep flocks in northern-central Tasmania were experiencing a high prevalence of ovine Johne's disease, 34 wild adult fallow deer shot on or near infected properties were negative to microscopic Mptb lesions of the ileo-caecal valve, terminal ileum and ileo-caecal lymph nodes. This study demonstrated 95% confidence of detecting Johne's disease in this fallow deer population if ≥10% of animals were shedding Mycobacterium avium subsp. paratuberculosis in their faeces, or if ≥21% of animals were sub-clinically infected.