Campylobacter jejuni and Pseudomonas coinfection in the setting of ulcerative colitis.

A 66-year-old woman presented with 2 days of fever and severe diarrhoea. She has a history of ulcerative colitis (UC), well controlled with medication. She also has a history of Ehlers-Danlos syndrome, infective endocarditis following aortic valve replacement and pulmonary embolism. She had complained of passing stool with traces of blood about 30 times per day. Stool testing for Clostridium difficile, routine culture and microscopy was done. She was started on ceftriaxone. CT scan revealed thick-walled colon consistent with UC flare. Flexible sigmoidoscopy showed active continuous colitis extending from the rectum to the proximal descending colon. Campylobacter jejuni was isolated from the stool and blood cultures yielded Pseudomonas aeruginosa. The antibiotic was transitioned to intravenous piperacillin/tazobactam and azithromycin followed by 2 weeks of intravenous cefepime. Her diarrhoea was controlled, and she was discharged for follow-up in 2 months.