What is the rationale behind BJD zoning in Australia?
Zoning is not unique to JD. It is an internationally recognised tool for managing the spread of infectious diseases. Australia has acted to enforce zones quickly for major disease emergencies, such as equine influenza in 2007. BJD zone classifications are defined under the Standard Definitions and Rules according to the level of infection and the level of disease control that is to be exercised in an area. Before national standards were initiated in the mid 1990s, states and territories took various approaches to JD concerning movement restrictions and quarantine. This has affected the distribution of the disease, and also the control programs applied today; so there are real differences between the states. BJD zone boundaries are not simply state borders. Zone boundaries must be based on transparent and easily recognised political or physical barriers and the boundaries often do not follow state boundaries. The Control Zone extends from Victoria into South Australia and New South Wale
