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Table 2 Results of ELISA I (IDEXX PRRS X3 Ab test) for detection of PRRSV antibodies (mean, standard deviation (s.d.), minimum, maximum S/P values)

From: Comparison of different commercial ELISAs for detection of antibodies against porcine respiratory and reproductive syndrome virus in serum

S/P value   Mean S.D. Minimum Maximum
Group 2 Positive 1.46 0.66 0.42 3.01
Negative 0.13 0.13 0.00 0.37
Group 3   0.01 0.02 0.00 0.20
Group 4   0.06 0.07 0.00 0.39
Group 5 Negative 0.07 0.06 0.00 0.31
Positive n = 2 - - 0.64 2.22