Figure. Representative results of ELISA and dipstick testing. A) Samples underwent ELISA in duplicate. Upper panel, positive samples in duplicate (1–2 and 3–4) in wells A–H, except A1–A2 (blank), and G3–G4 and H3–H4 (negative controls). Wells in columns 5–10 represent different negative controls in duplicate (5–6, 7–8, and 9–10), except F9–F10, G9–G10, H9–H10, and all wells in columns 11–12 (unused wells). Lower panel, the reference color card: a, positive; b, negative; c, blank. B) Dipstick test results. The left color band is the internal control line; the right color band is the test line.