The aim of this study was to investigate the relationship between blood biomarkers and serologic immunological profiles related to periodontitis (CRP, LPS, and serum anti- Aggregatibacter actinomycetemcomitans [Aa] and anti-Porphyromonas gingivalis [Pg] IgG) in abdominal aortic aneurysm patients. This evidence concerns the gene CRP and abdominal aortic aneurysm.