Since the early 1990's, there has been an increasing number of cases of Johne's disease diagnosed in both sheep and cattle in NSW. This has resulted in extensive changes in attitude to Johne's disease by industry, and an increased regulatory policy implemented by NSW Agriculture. Current policy for both sheep and cattle includes identification and investigation of high risk flocks, active tracing of movements into and out of infected herds and flocks and movement restrictions on infected herds and flocks. To manage the large amount of data generated by these activities an information management system for Johne's disease was developed. This is a relational database system, consisting of seven individual databases, developed in Epi Info v6, a DOS program for relational database management and epidemiological analysis of data. Data is recorded for individual properties, including current property status, history of status changes, investigations and testing undertaken, quarantines and notices issued, and tracings (stock movements) identified. Data is entered and managed on PCs at the local level by district veterinarians, with regular (monthly, or by request) updates of data at regional and state level. All records are uniquely identified to district and property level. The State database is an amalgamation of all data files from all districts for the State. The system is menu driven, and produces a range of pre-programmed reports at the State level for management of the program, monitoring of progress and epidemiological analysis, as well as reports at the local level to assist local management of the disease. Customised reports can be developed and saved for re-use using Epi Info reporting tools. Data from the system is being used to manage the OJD control program in NSW, and to model spread of the disease and predict its extent in NSW.