Overt Mycobacterium avium subsp. paratuberculosis Infection: An Infrequent Occurrence in Archived Tissue from False TB Reactor Cattle in Michigan, USA

Table 1

Summary of results of various screening tests for bovine tuberculosis and for results of PCR assays.

M. bovis screening test result	Number of cattle tested	MAP PCR positive	Percent MAP positive	M. avium PCR positive
(1) CFT and CCT positive	189	1	0.5%	0
(2) CFT positive	122	3	2.5%	2
(3) CFT negative (Control group)	73	4	5.5%	1
Totals	384	8	2.1%	3