Table 2.

Assessment of field samples by the conventional and colorimetric V/ N assays^*.

Sample	Replicate 1		Replicate 2
	Colorimetric	Conventional	Colorimetric	Conventional
1	1:32	1:16	1:32	1:16
2	1:16	1:16	1:16	1:16
3	1:8	1:8	1:16	1:16
4	1:64	1:64	1:128	1:128
5	1:64	1:64	1:64	1:64
6	1:32	1:32	1:64	1:64
7	1:16	1:16	1:8	1:8
8	1:8	1:8	1:8	1:8
9	1:32	1:32	1:32	1:32
10	1:64	1:64	1:64	1:64
11	1:8	1:8	1:16	1:8
12	1:16	1:8	1:8	1:8
13	1:32	1:32	1:32	1:32
14	1:16	1:16	1:16	1:16
15	1:32	1:32	1:16	1:16
16	1:128	1:128	1:64	1:128
17	1:128	1:128	1:64	1:128
18	1:64	1:64	1:64	1:64
19	1:128	1:128	1:128	1:128
20	1:32	1:32	1:32	1:32
21	1:32	1:32	1:32	1:32
22	1:64	1:32	1:32	1:32
23	1:256	1:128	1:128	1:128
24	1:128	1:128	1:128	1:128
25	1:64	1:64	1:64	1:64
26	1:128	1:128	1:128	1:128
27	1:256	1:256	1:256	1:256
28	1:64	1:64	1:128	1:128
29	1:128	1:128	1:128	1:128
30	1:64	1:64	1:128	1:128
31	1:256	1:256	1:256	1:256
32	1:256	1:256	1:256	1:256
33	1:256	1:256	1:256	1:256
34	1:512	1:512	1:1024	1:1024
35	1:32	1:16	1:32	1:32

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