Division 1.2 Additional sampling for the within-holding prevalence study

Together, 10 holdings, selected at random from the overall sample of breeding holdings and of production holdings are subjected to more intensive sampling. On these holdings 10 routine samples shall be collected in the same manner as described previously (Section 2.1 of Part A). In addition, 10 individual samples of at least 30 g shall be collected in each selected pen and shall be identified in such a manner that these 10 individual samples can be associated with the routine sample from that pen. Thus in total, 10 routine samples and 100 (10 × 10) individual samples shall be collected from each of these 10 holdings. The processing of these samples is described in Section 2.3.1.

This sampling should be applied in Czech Republic, Denmark, Romania, Slovenia, Sweden and the United Kingdom.