Division 1

The number of poultry establishments to be sampled and the number of poultry to be tested per establishment and, as appropriate, by epidemiological unit (e.g. poultry flock, shed, etc.) on the concerned establishment must be based on a statistically valid sampling method. This method may be that used for representative sampling; i.e. an estimated prevalence to be detected according to a pre-defined level of confidence determined by the competent authority.