There are many factors involved in human and animal brucellosis surveillance, such that no one system can fit all countries or regions. Therefore, all of the factors discussed above should be considered carefully in the design or evaluation stage. Also, as a control or eradication progresses successfully, a surveillance programme will almost certainly require modification to take into account decreasing incidence rates and to focus on new or re-infections, which may be more difficult to identify.
Once eradication has been achieved, then it is critical to maintain surveillance, especially for international trade purposes.
