Table 1B.

Detection of anti-PEDV antibodies in sera from the field from herds without clinical signs of disease.

Negative results are highlighted in bold.

¹The blocking (%) values are indicated together with the conclusion (Con.). A positive (Pos) reaction is defined as >40% block, while a negative (Neg) is defined as <35% block and results of 35–40% blocking are defined as inconclusive (Inc).

²Samples were tested using 2-fold dilutions, results are presented from 1:2 or 1:4 dilutions and the conclusion is shown. Blocking values >50% are Pos, values <40% are Neg and values of 40–50% are considered Inc.

³Assayed at dilutions of 1:4 and 1:8, the respective blocking (%) values are shown together with the conclusion (Con.) A positive (Pos) reaction is defined as ≥60% block, while a negative reaction (Neg) is defined as <60% block.

⁴In this test the ratio of the Sample(S)/Positive (P) control values were calculated. S/P values >0.4 are Pos while those below are Neg.