Could one infected tooth make others go bad?

Infection infects...: Infection is just that: it infects others. Infection may come from virus, or bacteria, or yeast, or other fungus, or combination of these. In any way, these organisms are a living thing, and keep growing. Just like us, when our population grows, we spread. Infecting organisms do the same--they spread out, just like termites hatching out and grow to invade inside of wood.