An infected aneurysm in the internal carotid artery caused by Salmonella enterica subsp. enterica serovar Enteritidis.

An infected aneurysm in the carotid artery is a rare but life-threatening condition. The most common cause of such infections is Staphylococcus aureus; however, Salmonella is a possible but uncommon cause. We report the case of an elderly man with an infected aneurysm in the left internal carotid artery caused by Salmonella enterica subsp. Enterica serovar Enteritidis despite the absence of gastrointestinal symptoms. Following confirming the absence of neurological symptoms after blood flow disruption through balloon test occlusion (BTO), the patient underwent coil embolization of the aneurysm and aneurysmectomy without neurological complications. Antibiotics were administered for 8 weeks and full recovery was achieved. Non-typhoidal Salmonella spp. can cause infected aneurysms in the carotid artery, even in the absence of gastrointestinal symptoms. Additionally, BTO may be beneficial for determining the treatment strategy for infected aneurysms in the carotid artery.