# Commission Decision of 20 December 2007 concerning a financial contribution from the Community towards a survey on the prevalence of Salmonella spp. and Methicillin-resistant Staphylococcus aureus in herds of breeding pigs to be carried out in the Member States (notified under document number C(2007) 6579) (2008/55/EC), Division 2.2.1: First stage: selection of holdings

Extent: E+W+S+N.I.

Each Member State must create two sampling frames. The first shall list all eligible breeding holdings (usually, those holdings with at least 50 breeding pigs — see Section 2.1) and the second shall list all eligible production holdings. The required number of holdings for each part of the Salmonella and MRSA surveys will then be selected at random from each list. A random sample is intended to ensure that the surveys include holdings with a range of herd sizes and from all regions of a Member State where pig-keeping is practised. It is recognised that in some Member States, there may be a few holdings (e.g. fewer than 10 % of all eligible holdings) with a very large herd size. Thus, random selection may by chance result in none of these very large herds being selected. A Member State may use a stratification criterion prior to holding selection — for example, to define a stratum containing the 10 % of largest herds and to allocate 10 % of the required sample size to this stratum. Similarly, a Member State may stratify the sample across administrative regions according to the proportion of eligible herds within each region. Any stratification that is considered should be described in the report that a Member State submits to the Commission in accordance with Part D (1).
If a selected holding cannot be sampled (for example, if it no longer exists when sampling is carried out) a new holding shall be selected at random from the same sampling frame. If any stratification (e.g. on herd size or region) was in operation, then the new holding should be selected from the same stratum.
The primary sample size (number of holdings to be sampled) shall be approximately equally distributed over the year to cover the different seasons, as far as possible. Samples shall be taken from approximately one twelfth of the number of holdings each month.
Outdoor holdings must be included in the survey but there shall be no mandatory stratification on this production type.

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Source: https://www.legislation.gov.uk/eudn/2008/55/annex/I/part/A/division/2/division/2.2/division/2.2.1 (the official version)
Page: https://openlegislation.uk/eu-decision-2008-55/annex-I/part-A/division-2/division-2.2/division-2.2.1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.