Food-poisoning bacteria may be behind Crohn’s disease. People who retain a particular bacterium in their gut after a bout of food poisoning may be at an increased risk of developing the disease later in life, according to a new study.

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Food-poisoning bacteria may be behind Crohn’s disease. People who retain a particular bacterium in their gut after a bout of food poisoning may be at an increased risk of developing the disease later in life, according to a new study.