"To figure out how all the different kinds of bacteria work together in the plaque biofilm, we have to understand the basic biology of these bacteria, which live nowhere else but the human mouth ...

Humans evolved this way as a survival technique ... They’ll also ask questions like: “Do you keep your mouth open when you are distracted?” or “Do you wake up with a headache?” ...

In a puppy’s mouth, C. canimorsus is no big deal. At least a quarter of all dogs and many cats carry them. Humans normally don’t, and once the bacteria got in Julie’s bloodstream ...