Which GI findings are characteristic of reactive arthritis (ReA)?

Updated: Dec 24, 2020
  • Author: Carlos J Lozada, MD; Chief Editor: Herbert S Diamond, MD  more...
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Enteric infections may trigger ReA. Pathogens include Salmonella, Shigella, Yersinia, and Campylobacter species. The frequency of ReA after these enteric infections is about 1%-4%. Other enteric bacteria that have been associated with ReA include C difficile, [79] E coli, and Helicobacter pylori. [19] (See Etiology.)

Some patients with ReA continue with intermittent bouts of diarrhea and abdominal pain. Lesions resembling ulcerative colitis or Crohn disease have been described when ileocolonoscopy is performed in patients with established ReA. [79] Although enteritis is usually a prolonged diarrheal episode with frequent passage of bloody loose stools, it can also manifest as a 24-hour episode of increased bowel activity.

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