Germs Quiz: What Lives in Your Mouth?

A dog's mouth is cleaner than a human's.

• True
• False

There's no basis for concluding that a dog's mouth is "cleaner" than a human's. Both humans and dogs have mouths that are full of bacteria, and both contain roughly the same number of bacteria. And there are more than 100 different germs in dog (and cat) saliva that can make you sick.