Karen Meyer et al in the USA have collected and published very persuasive evidence on the site crohns.org . However world events may well circumvent the power of producer organizations. Australian medicine is in the forefront of research towards control of Crohn's disease. Associate Professor Warwick Selby of the RPAH Medical Center is currently conducting phase III of a clinical trial of paratuberculosis antibiotic therapy. Some researchers are exploring the hypothesis that the hardy bug infects children and lies dormant till the changes associated with puberty.
Matured cheese is thought to be safe because it's acidity kills the para bacterium over time.