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

Table 3

Odds ratios for M. bovis test reactors compared to M. bovis test negative cattle, by PCR-confirmed MAP status.

Study group	MAP PCR positive			Fisher’s exact test 𝑃 value*	Odds ratio
	Total number	No. of Positive	Percent		Estimate	95% C I
(1) Primary and secondry test reactors	189	1	0.5	.0511	0.11	0.01–1.06
(2) CFT reactor	122	3	2.5	.4281	0.43	0.09–2.00
Groups 1 and 2 combined	311	4	1.3	.0458	0.22	0.05–0.92

*Fisher’s exact test compares the difference in the odds ratios between the bovine TB test group in that row verses the bovine TB test negative group.