Division 4.1 A laying flock shall be considered positive for the purpose of ascertaining the achievement of the ... target where:F1

1. (a)

   the presence of the relevant Salmonella serotypes (other than vaccine strains) has been detected in one or more samples taken in the flock, even if the relevant Salmonella serotype is only detected in the dust sample or dust swab; or

2. (b)

   antimicrobials or bacterial growth inhibitors have been detected in the flock.

This rule shall not apply in exceptional cases described in Annex II D point 4 of Regulation (EC) No 2160/2003, where the initial Salmonella positive result has not been confirmed by that respective sampling protocol.