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Brushing your teeth regularly could help to prevent bowel cancer, a study suggests. 一项研究显示，定期刷牙可有助于预防肠道癌。 This is because the mouth bacteria that cause bleeding gums can travel via the blood to the bowel where they could trigger cancer or worsen existing tumours. 这是因为，人口中有可以引起牙龈出血的细菌，而这些细菌能够通过血液进入肠道，从而引发癌症或者恶化已有的肿瘤症状。 The bug fusobacterium has been found to be hundreds of times more common in cancerous tumours than in normal cells. Now researchers have found that the microbes can make pre-cancerous growths in the bowel turn cancerous. They can also make any existing tumours in the bowel grow larger. Scientists are investigating how the bacteria make their way to the gut through the bloodstream. 和正常细胞相比，在恶性肿瘤细胞中发现“梭杆菌”的几率要高几百倍。现在研究人员们已经发现，这种细菌能够使得肠道中的良性肿瘤恶化演变成为癌症。此外，它们还会使得肠道内已经存在的肿瘤生长得更大。目前，科学家们正在研究这种细菌到底是如何通过血液循环进入肠道的。 | 
