New research from Finland suggests a link between oral infections and aneurysms. Finnish scientists studied 39 ruptured brain aneurysm specimens for bacterial DNA from various oral species? and the findings were quite interesting. The aim of this preliminary study was to assess the presence of oral and pharyngeal bacterial genome in ruptured intracranial aneurysms--and to ascertain if dental infection is a previously unknown risk factor for subarachnoid hemorrhage.
Of 36 specimens, DNA from endodontic bacteria was detected in 20 specimens, and from periodontal bacteria in 17 of the specimens. According to the study abstract, "Bacterial DNA of the Streptococcus mitis group (that's it in the photo, if you didn't recognize it), which has also been linked to endocarditis, was found to be the most common. Aggregatibacter actinomycetemcomitans, Fusobacterium nucleatum and Treponema denticola were the three most common periodontal pathogens."
This is the first study to provide evidence that intracranial aneurysm disease and dental infections could be associated with each other' and that dental infections specifically could be linked with the rupture of brain aneurysms. The full study was published in the November 2013 issue of the Journal of Neurology, Neurosurgery and Psychiatry. Titled "The connection between ruptured cerebral aneurysms and odontogenic bacteria," the study was conducted by researchers at the University of Tampere in collaboration with the University of Eastern Finland in Kuopio.