BBC News

 Bacterium 'to blame for Crohn's'

Researchers believe the lack of a specific bacterium in the gut may be a cause of Crohn's disease.

 A shortage of naturally-occurring bacteria is thought to trigger the inflammatory gastrointestinal disorder by over-stimulating the immune system.

    Now a French team has highlighted the bug, Faecalibacterium prausnitzii, which they show secretes biochemicals that reduce inflammation.

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