Table 2.

Screening test results in dairy cows

SITa	IFN-γ b	ELISAc	SIT (standard)d	SIT (severe)e
+	+	+	0	5
+	+	–	8	15
+	–	+	6	11
+	–	–	10	23
–	+	+	6	1
–	+	–	8	1
–	–	+	9	4
–	–	–	81	68
Total			128	128

^a single intradermal tuberculin test using standard interpretation

^b interferon gamma assay

^c a commercial antibody detection test (M. bovis Ab ELISA)

^d single intradermal tuberculin test using standard interpretation

^e single intradermal tuberculin test using severe interpretation