How Does Veillonella Form?
Bacterial communities are not formed randomly. Believe it or not, they're quite selective. The way they develop supports the growth of many species of bacteria at once. Veillonella, for example, doesn't ferment dietary sugars like Streptococci. However, it does use the lactic acid produced by Streptococci's sugar fermentation to create its own. Essentially, Veillonella bacterium could not survive if it didn't coexist with Streptococci. In turn, other species of bacteria need the environment created by Veillonella and Streptococci to survive.
The problem for you? When your tooth enamel is exposed to these bacterial acids over a prolonged period, dental decay begins. Additionally, the acidic conditions caused by this bacterium underneath the gumline eventually destroy the teeth' supporting structures, which can lead to tooth loss if left untreated.