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Oral bacterial metabolism is not only important for one species growth and development but important for the entire biofilm as well. For example, Streptococci spp. which is the most prevalent bacteria in the mouth ferments carbohydrates which produce lactic acid.
We know that some species of oral bacteria can double their numbers every 20 minutes under ideal conditions in a Petri dish. In the mouth, though, species have to compete with each other, and conditions are not always as idyllic as in the lab.e dont even know exactly how many species there are, let alone how to count them or how fast they grow. Estimates of the number of bacterial species in the oral cavity vary between 500 to 650 different species. They live on the teeth and tongue, of course, but biofilms also cover the cheeks and oral mucosa.