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“Tongue bacteria produce malodorous compounds and fatty acids, and account for 80 to 90% 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. “A number of other studies have also found this bacterium in halitosis patients.”
Sources: The Times Of India