科学家发现口臭的罪魁祸首

jk1688

Scientists find bug responsible for bad breath

By Megan Rauscher
Mon Apr 7, 6:10 PM ET

NEW YORK (Reuters Health) - Solobacterium moorei is the organism largely responsible for chronic bad breath, or halitosis, biologists reported Saturday at the annual meeting of the American Association for Dental Research in Dallas.

Persistent bad breath, which can be very embarrassing, is often caused by the breakdown of bacteria in the mouth, producing foul-smelling sulfur compounds that reside on the surface of the tongue. \"Tongue bacteria produce malodorous compounds and fatty acids, and account for 80 to 90 percent of all cases of bad breath,\" said Betsy Clark, a student at the State University of New York at Buffalo School of Dental Medicine. Some cases of bad breath originate in the lungs or sinuses.

In a study of 21 people with chronic bad breath and 36 subjects without this problem, Clark and colleagues found S. moorei in every patient that had halitosis compared with only four comparison subjects. The four people without halitosis infected with S. moorei all had periodontitis, an infection of the gums that can also lead to chronically bad breath.

In a previous study of eight patients with halitosis and five without, S. moorei was \"always found in patients with halitosis and never in patients who did not have this problem,\" Dr. Violet I. Haraszthy, who was involved in both studies, noted in a telephone interview with Reuters Health. \"A number of other studies have also found this bacterium in halitosis patients.\"

Haraszthy point out that, at present, \"not much is known about this particular organism.\"

\"As we identify and find out more about the bacteria that cause bad breath, we can develop treatments to reduce their numbers in the mouth,\" Clark added in a university-issued statement.

As reported Friday on Reuters Health, the same team of investigators has found that brushing twice a day with antibacterial toothpaste and using a toothbrush with a built-in tongue scraper can eliminate chronic bad breath.

{http://news.yahoo.com/s/nm/20080 ... bad_breath_found_dc}
美国医学研究人员证实，一种名为solobacterium moorei的细菌是造成口臭的罪魁祸首。

在本月于美国得克萨斯州达拉斯举行的美国牙科协会年会上，来自纽约州立大学布法罗分校口腔医学院的研究员贝齐·克拉克说，一些寄生在舌头表面的S. moorei分解食物残渣，产生有腐臭味道的硫化物。这种细菌于2000年才发现。

他说：“舌头上的细菌对口气有80％至90％的责任。”此外，还有一些寄生在肺部和鼻窦的细菌也可能影响口气。

克拉克的研究团队在对21名口臭患者和36名没有口臭的人做检查后发现，所有口臭患者口腔中都有S. moorei。而无口臭者中仅有4人口中发现了S. moorei。

克拉克的研究团队建议，每天用抗菌牙膏和带有舌苔刷的牙刷清洁牙齿和舌头表面，有助于减少不良口气。