Specificity
The test strip was used to test the positive control serum P1; PRRSV, FMDV-A, FMDV-O, PCV2, and CSFV positive sera; and healthy pig serum. The test results showed that only P1 was positive, and there was no cross-reactivity with other sera (Figure 8 ).
Figure 8 │Specificity of the test strip. 1: positive control serum P1, 2: PRRSV positive serum, 3: FMDV-A positive serum, 4: FMDV-O positive serum, 5: PCV-2 positive serum, 6: CSFV positive serum, 7: healthy pig serum.