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Ethnicity â Although Crohnâs disease can affect any ethnic group, Caucasians and people of Eastern European (Ashkenazi) Jewish descent have the highest risk. American Jewish people of European descent are four to five times more likely to develop IBD than the general population.
âThere is increasing evidence that genetics play a relatively large role in the development of Crohnâs Disease,â states Dr. Charles T. Richardson, a gastroenterologist with Baylor University Medical Center in Dallas, Texas.ince Ashkenazi Jews also have a higher risk for Crohn's, the genetic link is being explored as a possible explanation. Researchers believe that certain human chromosomes may have a role in determining whether or not someone gets Crohn's disease. Chromosomes are found within cell nuclei.