TABLE 2.

Specificity of antibody detection tests

HerdNeg/total (%)a
Test ATest BTest CTest DTest E
M65/67 (97.0)A66/67 (98.5)67/67 (100.0)60/67 (89.6)A,166/67 (98.5)
N41/42 (97.6)A42/42 (100.0)42/42 (100.0)37/42 (88.1)A,142/42 (100.0)
O42/50 (84.0)B,C,150/50 (100.0)50/50 (100.0)31/50 (62.0)C,248/48 (100.0)
P49/50 (98.0)A50/50 (100.0)50/50 (100.0)45/50 (90.0)A,150/50 (100.0)
Q36/37 (97.3)A37/37 (100.0)37/37 (100.0)25/37 (67.6)B,137/37 (100.0)
R56/56 (100.0)A56/56 (100.0)56/56 (100.0)53/56 (94.6)A56/56 (100.0)
S53/57 (93.0)B,157/57 (100.0)57/57 (100.0)53/57 (93.0)A,152/52 (100.0)
Combined17/359 (95.26)2358/359 (99.72)359/359 (100.00)349/359 (84.91)3351/352 (99.72)
  • a Neg/total, number testing negative/total number tested (i.e., the specificity). Superscript letters A, B, and C indicate statistical comparisons among herds (within column). Different letters indicate significant differences in specificity (P < 0.05). Superscript numbers 1, 2, and 3 indicate statistical comparisons among test herds (within rows). Values without numerical superscripts are not significantly different, and different numbers indicate significant differences in specificity (P < 0.05). The percent ranges for tests A, B, C, D, and E are 84 to 100.0, 98.5 to 100.0, 100.0, 62.0 to 94.9, and 98.5 to 100.0, respectively.