Table 1.

Inter and intra-assay variation of the colorimetric PEDV virus neutralization assay^*.

	Replicate 1#			Replicate 2#
	1	2	3	4	5	6
Negative
Visual	1:2	>1:2	>1:2	>1:2	>1:2	>1:2
Colorimetric*	1:2	>1:2	>1:2	>1:2	>1:2	>1:2
Positive
Visual	<1:1024	<1:1024	<1:1024	1:256	1:512	<1:1024
Colorimetric	<1:1024	<1:1024	<1:1024	1:256	1:512	<1:1024

^*A cut-off value of ≤ 0.53 OD was used to distinguish between positive and negative wells for the colorimetric assay.

^#Two independent assays with triplicate values each.