Come to find out, bacteria is not all that bad. In fact, it's quite necessary for human life to thrive.
Before giving an answer, let's think for a second about the kind of thing we can learn even from so commonplace an event.
Our planet is inhabited by a host of strange and remarkable creatures, but few as strange or remarkable, if you ask me, as hagfish. Hagfish are eel-like fish about a foot long. They have a small mouth that lacks jaws and teeth. Learn more on this Moment of Science.