The Journal of the American Heart Association recently published a Finish study that showed a link between the presence of a common mouth bacteria and stroke. They studied 75 stroke victims in which they extracted the stroke blockage material (thrombos aspirate). Seventy nine percent of the patients thrombos aspirate contained the DNA from a common mouth bacteria, called streptococcus viridans. Previous research showed while harmless in the mouth, when circulating in the blood stream, streptococci can infect heart valves and even bind to platlet receptors. This platelet binding can change the way the body forms blood clots and increase clot formation. This increase, researchers theorize may be a contributing factor in stroke victims.