In a very interesting study researchers have done the genome sequencing of cavity-causing bacterium Bifidobacterium dentium Bd1.
This bacteria lives in the gut and is supposedly beneficial there. It is also used in probiotic foods. However some strains are harmful as mentioned above and cause tooth decay.
The genetics studies have revealed the various adaptations of this bacteria which helps it to survive under everchanging conditions in oral cavity.
The study has been published in PLOS journal.
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