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Assessment of Serum IgG Titers to Various Periodontal Pathogens Associated with Atrial Fibrillation in Acute Stroke Patients

      Abstract

      Objectives

      There is accumulating evidence that periodontal disease is associated with atrial fibrillation (AF) or stroke, but it is unclear which causative species of periodontal disease are present in stroke patients with AF. We aimed to investigate the associations between AF and specific periodontal pathogens using serum titers of IgG antibodies of bacteria in acute stroke patients.

      Materials and methods

      Acute stroke patients were registered at two hospitals. Serum samples were evaluated for titers of antibodies against 9 periodontal pathogens (16 genotypes) using ELISAs. We identified AF in patients according to the following criteria: (1) a history of sustained or paroxysmal AF or (2) AF detection upon arrival or during admission. We carried out propensity score matching to categorize the patients as those with AF and those without.

      Results

      Of the 664 acute stroke patients, 123 (18.5%) had AF. After propensity score matching, 234 patients were selected. Patients with AF had a higher prevalence of positive serum titers of antibodies against Porphyromonas gingivalis (FimA type III) and Porphyromonas gingivalis (FimA type V) than those without AF (59.0% vs. 39.3%, p=0.004 and 58.2% vs. 40.2%, p=0.009, respectively).

      Conclusions

      Porphyromonas gingivalis, especially FimA type III and type V, might be associated with AF in stroke patients.

      Key Words

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