Potential for rapid antibody detection to identify tuberculous cattle with non-reactive tuberculin skin test results

Table 1 IgG reactivity rates in tuberculin skin test reactors and non-reactors found among M. bovis-infected cattle in GB

Animal group^a	No. of animals	Individual antigen reactivity rates in DPP assay^b		DPP assay reactivity rate^b (%, 95% CI)
Animal group^a	No. of animals	CFP10/ESAT-6	MPB70/MPB83	DPP assay reactivity rate^b (%, 95% CI)
M. bovis infected, TST Reactors	75	12 (16%)	43 (57.3%)	45 (60%; 95% CI: 48,71.2)
M. bovis infected, TST Non-Reactors	52	21 (40.4%)	21 (40.4%)	34 (65.4%, 95% CI: 50.9, 78)
Total M. bovis infected	127	33 (26%)	64 (50.4%)	79 (62.2%, 95% CI: 53.2, 70.6)
TB-free, TST Non-Reactors	50	2 (4%)	2 (4%)	2 (4%, 95% CI: 0.5, 13.7)

^aSera obtained from animals in multiple herds and of diverse age, gender, breed and management systems
^bData are presented as number (percent) positive per group for each antigen or assay

ISSN: 1746-6148