An aortic aneurysm infected by Brucella is rarely seen. In this case report, we describe a Brucella mycotic abdominal aortic aneurysm acquired from ingestion of sheep placenta. Clinical symptoms included fever, fatigue, and abdominal pain. Diagnosis was confirmed by blood culture and computed tomography (CT) angiography. The patient had increased abdominal pain during hospitalization, and repeated CT showed a rapidly enlarging mycotic aneurysm. Emergent endovascular repair was successfully performed using a bifurcated stent graft, and combined intravenous and oral antibiotics were administrated. The patient was asymptomatic after operation, and follow-up CT showed thrombosis in the aneurysmal sac and significant decrease of aneurysmal size.
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