Scientists are studying the role of oral bacteria in colon cancer. One of the most abundant bacterial species in the oral cavity is Fusobacterium necleatum. Although it is not a common species found in the gut it is found in almost half of all colon cancer tumors. Further studies have shown antibiotic treatment actually slows tumor growth, but because F. necleatum is so prevalent in the oral cavity chance of reintroduction to the gut is high. Further studies are ongoing, but it makes sense that better oral hygiene will decrease the amount of this pathogen and promote better overall health.