Possible MAP is a bystander, or makes IBD worse.
Really don't know of course as the doc's don't know.
Seems they are not detecting MAP in pre crohn's ulcers.
Although it has been suggested that aphthous ulcers of the GI tract are precursors of CD, we found no evidence of M. paratuberculosis infection in any of our patients with aphthous ulcers. If aphthous ulcers are indeed a precursor of CD our results raise the question as to when M. paratuberculosis infection may occur. One possible scenario is that M. paratuberculosis may colonise only once inflammation has been initiated.