DEAR DOCTOR K: I overheard a colleague talking about "poop pills" used to treat diarrhea. That can't be right. Can it?
DEAR READER: Yes, "poop" means what you think it means. Same thing as "doo-doo." It's gross, but it's true. So-called "poop pills" are being used to treat diarrhea caused by bacteria called Clostridium difficile, or "C. diff." Let me explain. Our intestines are filled with many different kinds of bacteria. Most live happily there; they don't invade or attack the intestine that is their home.