The ratite industry (mainly emu and ostrich) is not very large in Ontario. These birds are raised with outdoor access making biosecurity a greater challenge. Some producers collect eggs and have well designed incubation and indoor brooding systems. Biosecurity standards for these portions of the rearing cycle would be similar to those used in commercial poultry operations. Some ratite farms combine raising the birds with educational or tourist activities. Multiple visitors entering and leaving a farm would pose another serious challenge to a biosecurity program.
Never-the-less, the basic principles of biosecurity are proven to reduce disease risks and there are many areas of biosecurity that can be incorporated to keep your ratites healthy. For example, parasitic encephalitis caused by migrating larvae of the raccoon roundworm is a common disease problem in ratites in Ontario. This disease is a result of using bedding contaminated by raccoon feces. So purchase of straw or hay from a clean source and proper storage that excludes raccoon access would solve this problem.
The fact sheets on this site that are pertinent to ratite production include all of the principles of biosecurity and all of those in the management section. The 6 anatomy fact sheets are applicable to all types of birds.