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Table 3 Herd prevalence and within-herd prevalence in total and per age category detected by ELISA.

From: Prevalence of Lawsonia intracellularis in pig herds in different European countries

  1. A herd was defined as positive if antibodies were found in at least one sample per herd. The herd prevalence reflects the percentage of herds positive per country divided by the total number of herds sampled per country. The within-herd prevalence is the percentage of samples per herd and country with L. intracellularis antibody detection. All measured by ELISA of 60 herds and 1791 serum samples. The darker the field in the table, the higher the percentage of positive samples/ herds.