Rupture of a dissecting thoracoabdominal aortic aneurysm due to Citrobacter freundii infection

We describe a case of an elderly man with Citrobacter freundii‐associated infectious rupture of a dissecting thoracoabdominal aortic aneurysm. We performed an emergency thoracoabdominal aortic replacement using a rifampicin‐soaked prosthetic graft and omental flap wrapping. The patient was discharged on postoperative day 255, although he experienced pseudomembranous enteritis and paraplegia. Citrobacter freundii, an opportunistic bacterium, can infect residual dissections in the descending aorta, and the resulting infectious aortic aneurysm could rupture in a week. We found that a rifampicin‐soaked prosthesis and omental flap wrapping were effective in preventing vascular prosthesis infection.