If we can pay attention to oral diseases and prevent the inflammation of our gum, periodontitis or dental calculus, we can lower the risks of gastric cancer.

 "If we can pay attention to oral diseases and prevent the inflammation of our gum, periodontitis or dental calculus, we can lower the risks of gastric cancer."

S. anginosus could also act as a biomarker to show that the patient was at high risk of cancer or required close monitoring, which was important for early diagnosis and prevention.

He said the bacteria was often found in people's mouth and teeth, so maintaining oral hygiene could prevent the emergence of the bacteria and gastric cancer.

"People with periodontitis or dental calculus may carry this bacteria, which may be ingested into the stomach through saliva and lead to other conditions," he said.

‘Significant discovery’: Hong Kong study identifies certain bacteria as risk factor for stomach cancer (msn.com)