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Welcome back to part two of this episode of the Scientific American Podcast Science Talk posted on February 2, 2012. I'm Steve

Mercky. In the second part of my conversation with journalist and author Marin McKenna,

we talk about antibiotic resistance, including Mercer, and we'll pull up the rear with a brief

return to the subject of fecal transplants. Buckle up. Let's talk about antibiotic resistance

and agriculture, because that's such a huge issue. Much more antibiotics goes into agriculture than

being administered to people who are sick.

It's a really, really interesting and tangled story.

Most of it's with healthy animals.

That's right.

So when we talk about beating back antibiotic resistance or at least slowing its emergence,

which is something that I've been

really interested in for a couple of years. I wrote a book about antibiotic resistance called

Superbug. We tend to think of antibiotic misuse and overuse as something that people do, as

something that doctors and patients do. Either people don't take their full

antibiotic prescription, or they ask for antibiotics when they shouldn't because they have a viral

...