Division 3
United Kingdom
Without prejudice to the provisions of Article 15(2)(c) of Directive 2001/89/EC, the minimum number of pigs to be sampled within the defined sampling area must allow to detect 5 % seroprevalence with 95 % confidence. For this purpose at least 59 animals must be sampled in each area which has been identified.
It is also recommended that:
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in areas where hunting pressure is higher and regularly performed, or selective hunting is carried out as a disease control measure, approximately 50 % of the sampled animals belong to the three months to one year age class, 35 % to one to two years age class and 15 % to more than 2 years age class;
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in areas where hunting pressure is very low or absent, at least 32 animals are sampled for each one of the three age classes;
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sampling is performed in a short time, preferably not more than one month;
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the age of sampled animals is identified according to the teeth eruption.