Overall comparison of BSIT and CIT between VH and TC herds in annual testings (least square means and adjusted standard errors).

Notice that the ratio of positivity in the BSIT test is a highly significant 1/17 between TC and VH animals, while in the CIT it is a non-significant ¼.*Comparison between vaccinated as calves or cows;**Comparison between strategies;BSIT: bovine single intradermal test; CIT: comparative intradermal tests; VH: Vaccinated Herds; TC: Test and Cull herds. Student t-test with the Tukey-Kramer adjustment for multiple comparisons on the least square frequency means calculated in the analysis of variance.