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Table 3 Proportion of PEDV seropositive farms based on age, breed groups and farm size

From: A persistent epidemic of porcine epidemic diarrhoea virus infection by serological survey of commercial pig farms in northern Vietnam

  Criteria No. of PEDV seropositive farms/No. of examined farms
Age 18–23 weeks 5/5
24–30 weeks 14/14
Over 31 weeks 10/11
Breed LYD 16/16
LY 13/14
Farm size (no. of pigs) Less than 1000 6/6
1001–1300 9/9
Over 1301 14/15