Aortoabdominal aneurysm infected by Yersinia enterocolitica serotype O:9.

A 78-year-old-man was hospitalized for surgical treatment of a Yersinia enterocolitica serotype O:9 infected primary aortoabdominal aneurysm which ruptured soon after admission. Infection of aneurysm is an unusual manifestation of yersiniosis, especially in patients with no predisposing underlying condition. This case, and review of the literature, highlights that serotype O:9 has a predilection for vascular tissue. Cross reaction with Brucella spp. may be responsible for misdiagnosis of Y. enterocolitica O:9 infected aneurysms.