Episode 3 Operation Ouch!


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Episode 3

Clips from Operation Ouch! Discovering why we have microbes and parasites all over our bodies and how they help us.


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-Are you ready for our Ouch Snips?

-Snip.

-Ouch!

-Exactly.

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To find out why we have them and how they help us,

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I'm meeting entomologist, Vince Smith.

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We've got this parasite called a Demodex mite, and with these,

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the older that you are,

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the more likely you are to have them.

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So let's see if we can find some.

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Vince is scraping the skin around my eyes to try and collect enough gunk

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to test, but he doesn't get much, so we go into my ear.

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There's a good pile of gunk on there,

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so let's see what we can find.

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I'm sort of hoping he doesn't find anything.

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-You're loaded!

-Ugh, look at that!

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-Ugh!

-Wow.

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It's moving!

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-Absolutely incredible.

-That just came out of my ear.

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In the daytime, those mites are

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living inside the little follicles of your hair cell,

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and then during the night-time, they come out and they're moving around,

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trying to find all their mates.

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So every night, there's a bit of a party in my ear.

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# You better get this party started. #

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So these mites are pretty disgusting, but actually,

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they're not doing me any harm.

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In fact, they're useful because

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they help clean the gunk from your ear.

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We're carrying around all of these passengers, and this is just

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the start. There are many other human parasites that we've got, too.

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Time to head to the lab to meet some of Chris' little passengers.

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This time, not so friendly bacteria living in his mouth.

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Ugh!

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Does my breath smell bad?

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Yes, it does, actually.

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I'm not surprised. I haven't brushed my teeth in two days.

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-But it's all for a good cause. Isn't it, Chris?

-I hope so.

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In fact, it was my idea.

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Whilst I've been brushing my teeth twice a day, as you should,

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I haven't let Chris brush his at all for two days,

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but it's all in the name of medical research.

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-My teeth feel fuzzy.

-That's because Chris has a layer of plaque

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building up on them. Open wide.

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I'm going to show you why plaque isn't something you want a lot of.

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When you go to the dentist,

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you'll have had your teeth scraped like this.

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-Going anywhere nice on holiday this year, Chris?

-No.

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Oh, lovely, I've been there. It's wonderful at this time of year.

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Ugh, Chris, this is disgusting!

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Plaque is a mixture of food particles, acid,

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and bacteria.

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We've all got thousands of different bacteria living in our mouths,

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and most of them are harmless,

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but there are some bad ones that can

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turn the sugars in the food we eat into acid.

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And it's this plaque acid that's the real problem.

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It eats away at the tooth enamel, and that's what tooth decay is.

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-Please, can I have my toothbrush back now?

-Soon!

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There's more to show you.

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We're both going to rinse our mouths with a special blue dye that will

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show up how much plaque we have on our teeth.

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It's my brushed gnashers first.

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Ta-da!

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-Ha, you look really funny.

-You look funny.

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Now, even though Xander's been brushing regularly,

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you can see some dye has stuck to his teeth, and that's all plaque.

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That makes me a bit worried,

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because I haven't brushed my teeth for over two days.

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-Ugh! Why did you do that?

-It was your idea.

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Well, after a quick rinse with the blue dye,

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it's time to check out the state of my un-brushed teeth.

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Ugh!

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There's plaque everywhere.

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How did you let this happen?

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And all that plaque has built up in just two days.

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That's gross!

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I feel quite disgusting.

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-I would like my toothbrush back.

-Nope.

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I want to get a much closer look at your plaque, Chris.

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Look at this.

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Wow! So, these bacteria are the ones that live in my plaque,

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and although we can't tell which are

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the good ones and which are the bad ones,

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some of them are the ones that produce the acid that is rotting

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my teeth right now.

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Yes. And if you just leave plaque, it hardens like cement.

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That's called tartar and it builds and builds.

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It can damage your gums and give you rotting teeth that look like this.

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Not a good look.

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That's it. I've had enough.

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I am going to brush my teeth.

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No, he's not.

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We've shown you that we are all carrying little passengers around

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on our bodies. Most of them are there to help, but some,

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like the bacteria you find in your mouth, eat away at your teeth,

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which is why you need to brush twice a day.

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-See you next time. BOTH:

-Bye!

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-Bye!

-Bye!

-Bye. Bye.

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BYE!

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