Listen: Scientist, Jeanie And Chesley Winfrey discussed on BBC World Service
"For its mess. Thanks for coming in. So what you're gonna do if I'm going to start wait every that lives. There has its cheeks. Well, I'm gonna need you to swab the inside of opuses of cheek you can just kind of slide it in. Excellent. That's it. That's all we need that all gets packaged up into the envelope. It gets sealed up and then mail the way this will be sent off to the lab where the dogs DNA extracted and the details is stored on a database. So when Jeanie finds a PU. I opened up the box put on the gloves. Pull out the sample bottle. There's a solution inside and the direction show you to take an end portion. That goes into the bag, and then it's ready to be meal. The first time it was a little Vicky. But after that, I mean, it's very easy to do. And so I'm kind of used to it. Now this psalm police packed up in a cardboard box, and he sent in the regular mail over five hundred miles away to the lab with DNA database in Knoxville, Tennessee. We get a lot of in the mail. Our average mill day, maybe an imaging three hundred way samples per day in somewhere around eight hundred bugles swab samples per day Chesley Winfrey's, the scientist who developed a system to extract DNA from poo poo prints, and now she has the privilege of working with dope. Every day. It took off when a colleague of mine lived in an apartment and she actually stepped in Apollo pay her property. And so we thought you know, we we may be able to find the solution if we can successfully transport fecal material to the lab and still intact with the DNA not degraded and be able to pull a profile from the from the host here. We'll take you into the extraction live from this is the first step of processing, the waste people. If you wouldn't mind just stepping here on the sticky Matt to avoid contamination. Elizabeth and muddy of the scientists who deal with the waste zone polls. We have a lot of people ask how do you work in a lab all day where when it smells like, but a lot of times it really doesn't smell like two or we're just not sensitive to it anymore. So that actually that you're sucking into that pay. Yeah. So that's actually the PU sample from the dog will add ethanol in order to get the right consistency of the PU you don't want it to be too thick. And you don't want it to be too watery. Vortex. It just to basically just mixes it. And then I'm going to centrifuge it. And then once it comes out the liquid in the solid we'll be separated from one another. So that does make pretty Brown there at this point. Yeah, it's pretty Brown. Sometimes they'll smell sometimes I won't the worst part is when we put it in the center fuel for the first step, and then the air will blow out of the centrifuge, and that's probably the worst smell. If you're standing behind the centrifuge, I checked to make sure I wasn't.."