Division 2.2 The sample and the sampling strategy

Both parts of the Salmonella and MRSA surveys shall have a similar two-stage sampling design. In the first stage, a random sample of holdings shall be selected in every Member State from the breeding holdings and a second random sample shall be selected from the production holdings group. The number of holdings required is discussed in section 2.3. In the second stage, a number of pens shall be selected for sampling within every selected holding (see Section 2.2.2).