Okay, so what happens if I (french) kiss a person that is taking this bacteria producing continuously mutacin-1140 and ethanol ? Could it take over my mouth, and I would ended up mutacin tolerant, and accelerating my cirrhosis ?
Infants being kissed by their mothers might get it though, as they lack an already existing micro-biome in their mouths against which the new bacteria would need to compete.
Additionally, if you were in a relationship with someone and were consistently kissing that person over time, it might eventually establish a foothold. But a single kiss, no matter how wet and sloppy, is almost certainly not enough.
Surely that is analyzed in the FDA application file.
Oh wait, it's not.
Oh wait, there is no file.
Oh wait, they didn't do any significant testing at all.
To quote Dirty Harry, are you feeling lucky today?