A new study has found that bacteria commonly found in the mouth and gastrointestinal tract, particularly Streptococcus anginosus, are more abundant in the saliva and gut of people who have had a stroke. The researchers discovered that this bacterium increases stroke risk by 20%, while beneficial bacteria like Anaerostipes hadrus and Bacteroides plebeius were linked to reduced stroke risk.
The study, which analyzed oral and gut microbiomes from 189 stroke patients and 55 non-stroke participants, found that Streptococcus anginosus was associated with a higher risk of death and major cardiovascular events over the two-year follow-up period. In contrast, Anaerostipes hadrus and Bacteroides plebeius were found to reduce stroke risk by 18% and 14%, respectively.
The researchers hope to conduct similar studies in people who have not experienced a stroke but have risk factors for stroke. They also emphasize the importance of maintaining good oral hygiene to prevent tooth decay, which can contribute to inflammation and increase stroke susceptibility.
AHA representatives note that while the study has limitations due to its small sample size and Japanese population, it highlights the connection between oral bacteria and stroke risk. The findings suggest that a quick test to detect harmful bacteria in the mouth and gut could be used to help calculate stroke risk and potentially prevent stroke.
Maintaining good oral health is essential in preventing tooth decay, which can contribute to inflammation and increase stroke susceptibility. By reducing sugar intake and using toothpaste that targets Streptococcus anginosus and other harmful bacteria, individuals can take steps to reduce their stroke risk.
Source: https://neurosciencenews.com/oral-bacteria-stroke-neurology-28394