Fig. 2From: Evaluation and optimization of a conventional SPCE for FMD post-vaccination monitoringa–d Scatter plots and calculated regression lines between SPCE and LPBE (a, b) and between SPCE and VNT (c, d). Scatter plots show PI ratio of SPCE on the x-axis and logarithmic titer of LPBE or VNT on the y-axis. Dotted line represents the cut-off value for each test (1.17, SPCE; 1.81, LPBE; and 1.65, VNT)Back to article page