tigurinus In total, 20 out of 51 individuals had nicotine consumption, of which 11 had S. tigurinus detected in at least the saliva and/or plaque samples. This was not significant compared to individuals without nicotine consumption (31 out of 51, 16 with S. tigurinus detected in the oral samples), P = 0.813. In the periodontitis group, the number of patients with nicotine consumption and S. tigurinus detected in the oral samples
(n = 7) did not differ significantly from the patients without Ferrostatin-1 nicotine consumption and S. tigurinus in the mouth (n = 6), P = 0.543, respectively. Similar results were observed in the non-periodontitis control group, 4 individuals with nicotine consumption and S. tigurinus detected in the oral DNA Damage inhibitor samples were identified compared to 10 individuals without nicotine consumption but S. tigurinus detected in the mouth, P = 0.793. Discussion Members of the microbial flora originating from the oral cavity may be involved in the pathogenesis of systemic infections [18]. Biofilm formation, complex mechanisms with other bacteria or underlying
diseases might play a crucial role in the development of invasive infections. Regarding the pathogenesis selleck kinase inhibitor of chronic periodontal diseases, complex host-bacterial interactions are responsible for the initiation of tissue destruction [19,20]. Earlier studies have demonstrated that S. mitis, which is the closest related species to S. tigurinus, is a predominant early colonizing species of dental biofilms [21]. Although S. mitis is not a potent
N-acetylglucosamine-1-phosphate transferase inducer of immune responses, it can antagonize the capacity of A. actinomycetemcomitans to stimulate IL-8 [22]. Interaction of S. tigurinus with A. actinomycetemcomitans (a key pathogen associated with aggressive form of periodontitis in younger individuals) might be of interest [23]. Since its recent identification [11,12], it is not clear whether modifying factors are associated with the presence of S. tigurinus in the human oral microbiome and if its detection in the oral cavity has direct clinical implications in systemic diseases. Our data shows that S. tigurinus is a frequent bacterium colonizing the human oral cavity in periodontal health and disease.