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Have scientists linked Crohn's disease to anything?

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Scientists have linked immune system problems to inflammatory bowel disease (IBD), a group of conditions that includes Crohn's disease. Usually, cells of the immune system defend the body from harmful microbes -- bacteria, viruses, fungi, and other foreign substances -- that have entered it. The body doesn't usually respond to all microbes, however. Many microbes are helpful, especially for digestion -- so the immune system leaves them alone.

From: What Causes Crohn’s Disease? WebMD Medical Reference

SOURCES:

National Digestive Diseases Information Clearinghouse: "Crohn's Disease."

Crohn's and Colitis Foundation of America: "About Crohn's Disease."

Merck: (online version): "The Immune Response: Defenses Against Infection." Merck Manual: Home Edition for Patients and Caregivers

American College of Gastroenterology: "Inflammatory Bowel Disease."

Reviewed by Minesh Khatri on October 25, 2017

SOURCES:

National Digestive Diseases Information Clearinghouse: "Crohn's Disease."

Crohn's and Colitis Foundation of America: "About Crohn's Disease."

Merck: (online version): "The Immune Response: Defenses Against Infection." Merck Manual: Home Edition for Patients and Caregivers

American College of Gastroenterology: "Inflammatory Bowel Disease."

Reviewed by Minesh Khatri on October 25, 2017

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