 However, due to the precedence of Crohn's name in the alphabet, it later became known in the worldwide literature as Crohn's disease.Some evidence supports the hypothesis that the bacterium "Mycobacterium avium" subspecies "paratuberculosis" (MAP) is a cause of Crohn's disease (see also Johne's disease).As a result, researchers are looking at the eradication of MAP as a therapeutic option.