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Table 2 The number of positive (+) and negative (-) results in the analysis of antibodies to L. intracellularis in 176 sera obtained from growing pigs with or without diarrhoea and analysed by two different methods, an immunofluorescent antibody test, IFAT, and a blocking ELISA.

From: Evaluation of a blocking ELISA for the detection of antibodies against Lawsonia intracellularis in pig sera

   IFAT
   + -
ELISA (PI >30)* + 49 34
  - 18 75
ELISA (PI >35)* + 45 14
  - 22 95
  1. *In the blocking ELISA, two cut-off values (PI 30 and PI 35, respectively) were evaluated.