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Does focal destruction of the thoracic aorta wall by Staphylococcus aureus lead to the development of infected aneurysms?

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Does focal destruction of the thoracic aorta wall by Staphylococcus aureus lead to the development of infected aneurysms?

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OBJECTIVE: The infrequency of infected aneurysms suggests that either infection of segments of the aortic wall is uncommon, or that infections do not always lead top infected aneurysm formation. The purpose of the study was to determine whether focal Staphylococcus aureus infection of aortic wall segments leads consistently to the development of infected aneurysms and to evaluate the segments in which infection did not lead to the infected aneurysm formation. METHODS: Twenty pigs were inoculated with 0.1 ml of a Staphylococcus aureus inoculum in three segments of the thoracic aorta wall (study group). In another 10 pigs, 0.1 ml of saline solution was injected in three segments of the thoracic aorta wall (control group). Study group: histological abnormalities and bacterial culture of the inoculation sites were evaluated at 10 days (n = 5 pigs), 30 days (n = 5 pigs), and 90 days (n = 10 pigs). Control group: histological abnormalities were evaluated at 10 days (n = 5 pigs) and 90 days (

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