What Actually Caused Mad Cow Disease

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  • Опубликовано: 19 сен 2017
  • Do you remember the Mad Cow Disease scare from the 90s? What really happened? Did it go away? Join Stefan Chin for a mad new episode of SciShow and learn all about what really happened to those cows. Let's go!
    We're conducting a survey of our viewers! If you have time, please give us feedback: www.surveymonkey.com/r/SciSho...
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    سلطان الخليفي, Piya Shedden, KatieMarie Magnone, Scott Satovsky Jr, Bella Nash, Charles Southerland, Patrick D. Ashmore, Tim Curwick, charles george, Kevin Bealer, Philippe von Bergen, Chris Peters, Fatima Iqbal
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    Sources:
    www.oie.int/en/animal-health-i...
    www.cdc.gov/prions/bse/about....
    www.bseinfo.org/bseclinicalsig...
    www.scientificamerican.com/ar...
    www.hopkinsmedicine.org/health...
    www.mayoclinic.org/diseases-co...
    www.fda.gov/BiologicsBloodVac...
    www.who.int/mediacentre/factsh...
    www.cdc.gov/prions/vcjd/vcjd-...
    www.cdc.gov/prions/vcjd/risk-...
    ----------
    Images:
    en.wikipedia.org/wiki/File:Ap...

Комментарии • 2,1 тыс.

  • @Master_Therion
    @Master_Therion 6 лет назад +4682

    The odds of getting a Mad Cow Disease infected steak is... rare.

    • @boy638
      @boy638 6 лет назад +304

      Master Therion Well done on your joke.

    • @PMW3
      @PMW3 6 лет назад +229

      that makes me feel medium well

    • @xavierssounds3232
      @xavierssounds3232 6 лет назад +29

      Go home

    • @schadenfreudebuddha
      @schadenfreudebuddha 6 лет назад +33

      unlike so many other modern comedians, at least you don't work "blue." Eddie Murphy's "Raw" was infectious, though

    • @Abcdefghijklmnopqrstuvwxyz1024
      @Abcdefghijklmnopqrstuvwxyz1024 6 лет назад +12

      Master Therion
      Don't you mean extra rare.

  • @alzoron
    @alzoron 6 лет назад +1778

    Another thing not mentioned in the video that makes prions scary is that they're notoriously difficult to destroy. They can survive radiation, disinfectants and high temperature. Basically everything we normally do to disinfect food and food preparation surfaces does nothing to prions.

    • @masterkevkev
      @masterkevkev 6 лет назад +417

      That's basically because prions aren't actually "Bacteria" or a virus... they're just proteins. Bad.... bad proteins.

    • @VienerSchnitzel69
      @VienerSchnitzel69 6 лет назад +235

      And they have a 100% mortality rate meaning that they are the only infectiously spread disease that kills everyone it infects.

    • @beezusHrist
      @beezusHrist 6 лет назад +152

      William Lesco and they can lie dormant for decades appearing in later stages of people's life which makes doctors misdiagnosis the disease as dementia at times. I'm POSITIVE there have been more than 230 deaths worldwide from CJD.

    • @MarioSanchezAbelenda
      @MarioSanchezAbelenda 6 лет назад +36

      VienerSchnitzel Rabies does too, it has 100 per cent mortality ratio when synthoms show up (it's quite rare, and sorry if I wrote something wrong).

    • @VienerSchnitzel69
      @VienerSchnitzel69 6 лет назад +95

      Mario Sánchez Nearly 100% but about 99.9%. About 8-10 people have survived it through the use of the Milwaukee Protocol.

  • @kimboxdorfer7010
    @kimboxdorfer7010 6 лет назад +541

    I have unfortunately been learning about prion disease for the last 15 years. My family carries the genetic mutation for CJD (sometimes called fCJD because it's familial). If you have this genetic mutation your life proceeds as normal from birth and then something kickstart's the disease. My grandma was in her sixties, my mom was in her late 50s, and I had a cousin pass this summer in her early forties. Once you begin having symptoms there's nothing to do, no treatment, no help. You have weeks to months to live at that point. And every part of you that makes you, disappears. You start feeling dizzy and maybe have a slight hand tremor. The neurologist tells you you're crazy to think that it's cjd. Don't you know how rare it is? They've never had a single patient with cjd! It's much more likely an essential tremor. You have trouble remembering words, being able to speak your thoughts clearly. You lose the ability to walk and dementia starts. Pain comes when you're no longer able to move limbs like you could before and all your muscles lock up. And of course bladder and bowel control also goes pretty quickly. Towards the end you lose consciousness, only really waking when your body is turned to prevent bed sores or your catheter is checked and that's because of pain. And then when you're lucky you stop breathing.
    If you carry the mutation for this disease, you will develop it at some point. And you have a 50% chance of passing this autosomally dominant mutation to your children. And you have to watch family member after family member go through the same thing. And the neurologist who didn't believe you before now sends you Christmas cards, every year. Because the thing you hate most about your family, he finds interesting.
    And there is a stigma. Funeral homes don't really want your body. They suggest direct to cremation or a closed casket with no embalming. No one in your family, even those who test negative, can ever donate blood again or an organ. But of course you don't want anyone else to ever have to have this disease(not that they could get it from someone who tested negative), so why would you argue. And there's also this idea that you have something in your body that is both genetic and contagious. I used to tell the people at my work that if I fell and cracked my head open to just leave me be.
    All because of a tiny misfolding Prion...

    • @wayermane5069
      @wayermane5069 2 года назад +152

      I would consider not having kids in this situation.

    • @garry29
      @garry29 2 года назад +6

      @@wayermane5069 ya but you feel heavened when you come to know that you already have 2 sets of twins

    • @moshariff6320
      @moshariff6320 2 года назад +10

      How u doing now?

    • @kimboxdorfer7010
      @kimboxdorfer7010 2 года назад +93

      @@moshariff6320 Life finds a way to continue. The realization that everybody dies actually brings comfort. Mostly because it means that you aren't that special, even with a rare genetic disease in your family.
      The trauma does continue. We all had young families when we learned about fCJD and now those babies are on the cusp of adulthood. There is an invisible divide in our family, because we know the genetic status of the children of the family members who tested negative. You can't pass on an autosomal dominant mutation if you don't have it. Those kids and young adults are safe.
      But the children of family members who carry the mutation will need to have hard conversations. We've never hidden this, but we have also never sat down and explained it in detail. They will need to decide if they want to be tested, if they want to have children, if they want to participate in research. They will have to figure out for themselves how to live with this.
      So as a family we are celebrating 16th birthdays, first loves, and high school graduations with this hanging over our heads.
      But life continues and for the most part, I am doing OK. Thanks for asking.

    • @sunnyquinn3888
      @sunnyquinn3888 2 года назад +27

      That's the part of the disease I have a hard time wrapping my brain around. The idea of a disease that is both genetic and contagious goes against everything I thought I knew about where diseases come from.

  • @rparl
    @rparl 6 лет назад +211

    Feeding dead cows to live cows is diasgusting. I spent time on some dairy farms and they would NEVER do that. I blame industrial, factory farms and their MBAs.

    • @rparl
      @rparl 4 года назад +5

      @Phoenixsaurus Rex In feed lots, where cattle are fattened for final sale, they are fed (salty) anchovies, so they will temporarily gain water weight.

  • @AndrewKnesse1
    @AndrewKnesse1 6 лет назад +935

    so... changes in mooooood?
    I'll go home now...

  • @Joeobrown1
    @Joeobrown1 6 лет назад +2221

    wait, dead cows were fed to other cows? that's like a chicken going to kfc

    • @zachrowell6795
      @zachrowell6795 6 лет назад +94

      Joe Brown Cows are also fed chicken manure on a regular basis.

    • @speedy01247
      @speedy01247 6 лет назад +299

      unlike cows chickens DO eat other chickens. But then again they are capable of eating and processing that meat unlike cows who are supposed to be herbivores.

    • @roxyzaraza111
      @roxyzaraza111 6 лет назад +23

      Sitting on Ceilings ur digestive system can't handle of it

    • @johnlocke3426
      @johnlocke3426 6 лет назад +52

      Cattle are capable of digesting meat, they're just much better at digesting plant matter.

    • @codename9824
      @codename9824 6 лет назад +31

      Joe Brown refeeding livestock was pretty common until the Mad Cow issue popped up. There are multiple species the are effected by spongiform encephalopathy, scrapie is sheep, MCD in cows, Kuru and CJD in humans.

  • @worleyzack
    @worleyzack 3 года назад +121

    I have health anxiety and I've been struggling with the thought of having a prion disease. I've had muscle twitches, loss of appetite which are all symptoms of anxiety. But this video helped me put that aside and I've stopped worrying now that I know it's close to impossible to even have a prion disease in the U.S. It doesn't run in my family neither.

    • @somneang87time29
      @somneang87time29 3 года назад +7

      How’s your sleep?

    • @worleyzack
      @worleyzack 3 года назад +9

      @@somneang87time29 It's getting better, hopefully it stays that way.

    • @awogames9042
      @awogames9042 2 года назад +1

      How’s it going?

    • @leonjiang2318
      @leonjiang2318 Год назад

      @@Etaoinshrdlu69 is this true

    • @cob-son
      @cob-son Год назад +3

      ive had something similar after a very traumatic event in my life. turns out it's just hypocondria, stress and anxiety.

  • @jacobmeier2716
    @jacobmeier2716 5 лет назад +259

    Anyone else here after hearing about the deers having a disease like this

  • @brycxio
    @brycxio 6 лет назад +1678

    The real concern is Mad Snail Disease

    • @brycxio
      @brycxio 6 лет назад +84

      Too Slow🐌 lol

    • @brycxio
      @brycxio 6 лет назад +4

      *⛵

    • @strifera
      @strifera 6 лет назад +18

      You meant Mad Snail Disease, but I'll blame your typo on the ADD.

    • @jriibzmodus4792
      @jriibzmodus4792 6 лет назад +14

      Sponge bob!

    • @shironasama0445
      @shironasama0445 6 лет назад +1

      t.c.a.w Exposed Dang it I was going to say that

  • @micahphilson
    @micahphilson 6 лет назад +1068

    I was actually thinking about this just the other day. All those major diseases all over the news every once in awhile seem to just vanish after a few years. When I was younger, Mad Cow seemed to be plastered everywhere and was a household name, but I realized the other day that I hadn't thought of it in at least a good 5-6 years now.

    • @Abcdefghijklmnopqrstuvwxyz1024
      @Abcdefghijklmnopqrstuvwxyz1024 6 лет назад +46

      Micah Philson
      Except cancer it's still here.

    • @KhanMann66
      @KhanMann66 6 лет назад +84

      Anybody remember SARS? Bird flu? Swine flu?

    • @MatanuskaHIGH
      @MatanuskaHIGH 6 лет назад +30

      Micah Philson media propaganda

    • @Spartan0430
      @Spartan0430 6 лет назад +59

      we're talking more about "fad" diseases that just randomly become super popular on the news like mad cow disease, swine flu, ebola, zika etc.

    • @MelissaFlaquer
      @MelissaFlaquer 6 лет назад +72

      Or they just don't affect the people with the money, ebola, malaria, zika and chikunguya are still an issue in several countries. Colera and Polio are still there and the news don't talk about tuberculosis as much as they should given that it is one of the most common infectious diseases in the world. BTW, there was a case of vCJD last year.

  • @GumaroRVillamil
    @GumaroRVillamil 6 лет назад +210

    New farming techniques? So not feeding dead cow brains to living cows is new? Who knew!?

  • @xxExoticButterzxx
    @xxExoticButterzxx 5 лет назад +113

    "Your steak is almost... definitely... probably... not infected"
    *CLOSE ENOUGH I GUESS*

  • @PopsicleSponge
    @PopsicleSponge 6 лет назад +881

    I studied this at uni and wrote a paper about it. Its a prion disease. The protein chains affected adopt a different tertiary folding structure. One in which the atoms actually take up less space than in the original thus leading to gaps and an overall spongey bulk material. Because this incorrect form is actually more energetically favorable it acts as a template or chaperone protein. nearby proteins of the same secondary polypeptide chain structure, naturally follow the influence of this new form and follow suit to adopt that same folded shape.The entropy of this interaction is wholly -ve meaning no effort is actually required to keep it going once its begun, so the change is spontaneous once infection occurs. Some of the first investigations into CJD were on a disease called Kuru. Tribes in papa new guinea had a tradition of eating the brain tissue of dead tribe members after their passing, but without cooking it. This lead to the incorrect, for our bodies needs anyway, but again energetically favorable structure getting into the body. Leading to degeneration. And killing alot of people. And BSE turned my dad vegetarian for about 15 years xD. Please Fact check me on this. I'm sure someone can spot an error here.

    • @keynoism
      @keynoism 6 лет назад +121

      Dude - Comments like this are why I ever brave to scroll down - thank you.
      Especially the part about how the reaction is sustained - you have filled me with thought food

    • @MisaelKpo
      @MisaelKpo 6 лет назад +78

      Sooooo, literally a Domino effect, one part of the system lowers it's energy and everything follows.

    • @fishbuddy547
      @fishbuddy547 6 лет назад +10

      Thank you for the info.

    • @BRUXXUS
      @BRUXXUS 6 лет назад +32

      I'm probably wrong, but didn't some studies find a mutation in some of those tribe members that made them immune to Kuru?

    • @VienerSchnitzel69
      @VienerSchnitzel69 6 лет назад +12

      It'd be good to mention the name of the protein, prion protein (PrP), as well as its extremely heavy concentration in the brain relative to the rest of the body. I also have to ask, your father had Classic CJD rather than vCJD correct. I'm thinking about writing a paper on it myself, the topic is fascinating with the various types of prion diseases and the incredible biochemistry behind how the mayhem is caused.

  • @givemeasi
    @givemeasi 6 лет назад +737

    Cows are herbivores, if you kept cows eating cow food this wouldn’t have happened

    • @booisl33t
      @booisl33t 6 лет назад +72

      ...cows and other herbivores will opportunistically eat small animals/scavenge carcasses. it's creepy as hell.
      ruclips.net/video/qkQ7o-gWWng/видео.html

    • @booisl33t
      @booisl33t 6 лет назад +25

      watch linked video at your own risk. contains footage of deer and cows eating live birds, etc.

    • @maximillianlylat1589
      @maximillianlylat1589 6 лет назад +69

      even then this is why cannibal practices are unwise in any animal including humans. infact humans can get a similar effect like mad cow disease from being a cannibal but have no effect when eating any other animal.

    • @booisl33t
      @booisl33t 6 лет назад +43

      it's not the cannibalism that is the issue. prion diseases are caused by consuming infected nervous tissue (brains/spinal cords). it can and does cross species. the mad cow outbreak was due largely to feeding infected sheep to cows. humans can get it from eating infected squirrel brains.

    • @codyminecrack248
      @codyminecrack248 4 года назад +4

      All the food is poison 🎶

  • @corv1d770
    @corv1d770 6 лет назад +16

    I had an elementary school teacher of mine who died of Kruetzfeld-Jakob a few years ago. She must have been infected when she was younger and it simply gestated in her body until it was activated and started killing her. When I researched to figure out what it did to the infected it made me feel sick honestly. She was such a sweet woman and from what her family had reported she had been reduced to an aggressive, angry person with no sense of what was going on around her. It's devastating.

  • @stephenbrand5661
    @stephenbrand5661 3 года назад +14

    I was only 8 years old in 93 so this definitely reminds me of my childhood, I remember seeing the drooling, stumbling cows on tv and being pretty freaked out by it.

  • @Primecat854
    @Primecat854 6 лет назад +160

    Surprised you didn't mention Kuru when talking about Prions and the whole lot of nastiness they cause, either way this was a good watch!

    • @interstellarsurfer
      @interstellarsurfer 6 лет назад +2

      + Final Marauder Then they would have to admit the root cause of Mad Cow Disease - when Indian subcontractors, hired to turn boatloads of frozen, dead cows into 'pet food', started buying local human corpses and bones by-the-pound, to grind up and resell as 'pet food'.

    • @jzk3919
      @jzk3919 2 года назад

      And Richard Rhodes (Pulitzer prize author) documentary book, the "BIG FEASTS" tells it the best.

    • @neuswoesje590
      @neuswoesje590 2 года назад

      @@interstellarsurfer riiiight cause I'm sure buying human corpses on the black market, turning them into food and selling it while hiding all of it was much cheaper than just buying animal meat lol

    • @interstellarsurfer
      @interstellarsurfer 2 года назад

      @@neuswoesje590 You're unfamiliar with the concept of padding the bill? Besides, a dead body is a liability - and animal feed an asset.

  • @Wes8761
    @Wes8761 6 лет назад +24

    Im a 13 year old (probably way in over my head) researching prion disease and new youtube videos from good sources always help! Thanks Guys!!!

    • @spicy_tomato641
      @spicy_tomato641 Год назад

      Dam

    • @SinfulKitty
      @SinfulKitty 8 месяцев назад +1

      Happy 19th birthday

    • @Wes8761
      @Wes8761 8 месяцев назад +2

      @@SinfulKitty Its actually October 15th lol, close tho

  • @stork2889
    @stork2889 5 лет назад +10

    My preschool teacher had mad cow disease, she didn’t work in school for like 2-3 years, she forgot how to eat, how to move and how to be alive. She died in her mid 60’s.

  • @steventoerner4035
    @steventoerner4035 6 лет назад +99

    Feeding dead cows to cows probably saved them money somewhere. Money is always the root of all evil.

    • @Yora21
      @Yora21 6 лет назад

      What food contains all the ingredients that a cow needs to grow more meat cells? Cow meat. A cow can't digest a steak well, but if it's already powdered there's no problem.
      Aside from transmitting disease.

    • @TheBespectacledN00b
      @TheBespectacledN00b 6 лет назад +1

      The practice started in the 1950s if I remember rightly. The British government in this segment days had a mania for improved self sufficiency in food, given the German U-boats had nearly starved us out during the Second World War. So encouragement was given to anything that could get meat production moving more quickly was to be welcomed. For context, meat was still rationed in the early fifties in Britain. And people were getting pretty sick of it.

    • @Admiral_Jezza
      @Admiral_Jezza 6 лет назад +3

      Steven Toerner It's more greed than money itself, but it's easy to see your point.

    • @BuickDoc
      @BuickDoc 5 лет назад +4

      "The LOVE of money is the root of all evil."

    • @PrinceZappa
      @PrinceZappa 4 года назад

      @@TheBespectacledN00b pretty much all food was rationed in the early fifties in Britain, almost hard to believe.

  • @commanderkei9537
    @commanderkei9537 6 лет назад +27

    Am I the only one to never let go of my paranoia of this disease? The idea that it could slowly destroy your brain was and IS horrifying

    • @O-townplaya
      @O-townplaya Год назад +5

      Me too. I even stopped consuming beef

    • @pipsapossu1699
      @pipsapossu1699 Год назад

      well if it is 100% deadly why worry.

  • @DrPlaneteer
    @DrPlaneteer 6 лет назад +73

    I remember mad cows being a thing when I was younger... good to know it's mostly under control... prions diseases sound terrifying

  • @rockoutloud2me
    @rockoutloud2me 6 лет назад +15

    As someone who works in blood banking thank you for mentioning it! A lot of people don't realize it can affect their ability to donate.

  • @alysonshorthouse8858
    @alysonshorthouse8858 5 лет назад +13

    I worked for the Meat Hygiene Service from 1995 to 2000. BSE was a huge deal, the precautions were insane

  • @dunzerkug
    @dunzerkug 6 лет назад +6

    There is a similar prion disease in humans called Kuru. Groups in Papua New Guinea that practiced cannibalism in funeral ceremonies cooked and ate most of the body including the brain. After the practice was discontinued new cases dropped dramatically but it still popped up for over 50 years from people who were infected before the practice was ended. The last official death from Kuru was in 2009 and the epidemic was declared over in 2012 with no verifiable cases since.

  • @joolzzenda
    @joolzzenda 6 лет назад +54

    I haven't thought about mad cow disease in years! It was never really explained to us very well so I grew up scared that I'd die if I went near farm animals. I guess that's a good way of keeping kids from trespassing in farmers fields

    • @Yora21
      @Yora21 6 лет назад +3

      Simply don't eat cow brains. Which apparently in the 90s was still a thing.

    • @redneckninja313
      @redneckninja313 6 лет назад

      It still is.

    • @mikeferster7966
      @mikeferster7966 5 лет назад

      yes because walking next to a fkn cow instantly transmits the disease... ppl don't trespass on farms, and sry if your dumb friends did back in school but more people just throw things in with the cows like poisoned meat or harmless trash. cow tipping is for people with no friends or money

  • @afilina
    @afilina 4 года назад +42

    I know someone who died from this in the 90's. I had no idea that it was so rare.

    • @Student0Toucher
      @Student0Toucher 3 года назад +3

      Search up the new Canadian brain disease sounds a lot like this disease

    • @whatname3676
      @whatname3676 3 года назад +1

      @@Student0Toucher yeah, i wont be surprised if zombies became real

    • @triggadre1930
      @triggadre1930 3 года назад +2

      @@whatname3676 Lay off the weed man. Moderation is key.

    • @crypticpancake6595
      @crypticpancake6595 3 года назад

      That is scary

    • @stephanienader7604
      @stephanienader7604 2 года назад +6

      My teachers passed away from this mid-year in second grade. It was sad, she was one of those teachers that everybody liked and was skilled at her job. :(

  • @JennWanderer
    @JennWanderer 4 года назад +58

    In this Covid-19 reality, youtube just keeps recommending Sci Show disease videos.

    • @jakeg3126
      @jakeg3126 4 года назад +3

      They have that algorithm that varies what is recommended for you by what your watching, what other people are watching, and what they want you to watch. Like google and the politicians of their choice around election time or censor how good or bad a celebrity is

  • @Rosalynn78
    @Rosalynn78 6 лет назад +14

    Great video! I work in the industry where we prevent the bovine nervous system getting into food sources and I'm going to use this as my training intro video to why our job is important!

  • @seatbelttruck
    @seatbelttruck 6 лет назад +17

    My great-grandpa died of Creutzfeldt Jakob. I'm pretty sure it was just the regular disease, not the variant, however. I don't remember what year he died, but it was before I was born, so almost certainly before the whole mad-cow thing.

  • @shereygould9307
    @shereygould9307 5 лет назад +9

    Glad you touched on the blood donation angle for the U.S. Every single time the bloodmobile comes to town, I pop in and ask if I'm eligible yet. They *say* they're working on a screening test but I'm still not allowed to donate as I lived in Germany 1990-2002.

    • @normalhuman9878
      @normalhuman9878 2 года назад

      My mom also lived in Germany in the 90’s
      She mentions the fact she can’t donate blood every time we see the blood truck

  • @densealloy
    @densealloy 6 лет назад +12

    Another prion disease is Fatal familial insomnia (FFI) which is interesting and horrifying to read about if interested. Great video as usual.

  • @elioo560
    @elioo560 6 лет назад +50

    I bet mad cow disease caused utter chaos.

  • @coughdrop01
    @coughdrop01 6 лет назад +10

    There is no phrase that makes me feel older than "if you were around in the 90s"

  • @Jeffrey314159
    @Jeffrey314159 6 лет назад +5

    1:58 Starting in early 1970's energy crises they decided to use less fuel when cooking the ground up remains of cattle( to feed other cattle) by boiling the material in a low pressure chamber.

  • @jerri1255
    @jerri1255 5 лет назад +2

    I read that the prions bind with plants very well. When the animal dies or sheds the prions the plants take it up, another animal eats the plants and the cycle begins again. I hope that is not correct.

  • @ScottBooneAZ
    @ScottBooneAZ 6 лет назад +3

    I still can't give blood because I was in England in 1982-1984. I wish I could again as I have a rare type and gave over 10 gallons before I was prohibited giving in the late 90s.

  • @cindroman
    @cindroman 6 лет назад +5

    I'm really curious and fascinated by prion diseases and this epizode was especially usefull. Thanks a bunch and keep up the good work.
    Best regards from a nerdfighter in Croatia !

  • @katieg3163
    @katieg3163 5 лет назад +5

    My family friends that live down the street lost their dad to this disease. They think he picked it up during a deployment in Germany. It took about two months for him to completely deteriorate. It was really sad to watch him fade, and he had seemed really healthy up until that point.
    It was a crazy fluke, really rare, but I hope someone finds a cure anyway.

  • @flavvsdasilver6442
    @flavvsdasilver6442 6 лет назад +4

    Stefan Chin is a great presenter for the show - I liked his delivery of this episode.
    Keep it up Stefan!

  • @ScottSorrellcanada
    @ScottSorrellcanada 6 лет назад +44

    I can die a happy man now. Hopefully not from vJCD! Worth every patron dollar!

    • @truthxposed8975
      @truthxposed8975 4 года назад

      This video actually sucks. Let me explain why facebook.com/rachel.nicole.16121/posts/101302537382411

  • @dallasnicole5089
    @dallasnicole5089 6 лет назад +380

    whyyy do they feed cows to cows?! wtfff

    • @brycxio
      @brycxio 6 лет назад +115

      That my question. Companies are always after the easiest profit, but at what point do they realize a quite obvious line has been crossed.

    • @pikatzer
      @pikatzer 6 лет назад +49

      how else do you make a Krusty Burger Squared?

    • @fep_ptcp883
      @fep_ptcp883 6 лет назад +24

      It is called "Cowception"

    • @jovanbergh33
      @jovanbergh33 6 лет назад +64

      Sitting on Ceilings In what sense is forcing bovines to participate in canabalism smart business? A species that is generally consider herbivores preferring vegetation..

    • @rudyjanke5942
      @rudyjanke5942 6 лет назад +54

      They used to feed cows to cows as a way of recycling the raw protein back into the product as to not be wasteful. Actual bone and meat "meal" is off the market, but blood meal is still used in small quantities. This Blood meal is tested and proven to be safe before being added to the food. Essentially a pound of blood is a pound of protein. This makes it hard to just throw away.
      --A trusted dairy farmer in mid Wisconsin area, who currently raises 400 organic cows.

  • @MrHatoi
    @MrHatoi 6 лет назад

    I actually subscribed to this channel because of your video on prions when I was researching Mad Cow Disease... It's all come full circle.

  • @willdixon9525
    @willdixon9525 6 лет назад +1

    Thanks for sharing. Liked and appreciate your time.

  • @KarlBunker
    @KarlBunker 6 лет назад +51

    Cow 1 to cow 2: "Are you worried about mad cow disease?" Cow 2: "Why would I be? I'm a chicken!"

  • @Tocsin-Bang
    @Tocsin-Bang 6 лет назад +4

    The first cases in the UK were identified by Carol Richardson, a former colleague, at the Central Veterinary Laboratory at Weybridge in Surrey. The Scrapie idea is my favourite. I remember there being brain specimens in the freezers in the Pathology Department at CVL. I prepared slides there back in the 60s.

  • @amberbydreamsart5467
    @amberbydreamsart5467 6 лет назад +6

    My family lived in the UK for six months around 1998, and weren't allowed to give blood for a very long time. Fun to know more about why!

    • @O-townplaya
      @O-townplaya Год назад +1

      You shouldnt normally be allowed to ever give blood

  • @chanceaaronblack2792
    @chanceaaronblack2792 6 лет назад

    I learned some new stuff here today. Thank you for sharing this info!

  • @jessus1026
    @jessus1026 6 лет назад +3

    There was also a prion disease that was very common in a Papua New Guinea tribe that engaged in post-funerary cannibalism. They called it Kuru disease and even after discarding the practice, it took decades to die out because of its years long incubation period.

  • @phantasm1234
    @phantasm1234 6 лет назад +4

    Hello, SciShow! Do you think you could make a video explaining the current knowledge of cerebral aneurysms? I had one rupture at 19 and after learning so much about them, I would love for a bigger audience to learn of them!

  • @82dorrin
    @82dorrin 11 месяцев назад +1

    This video was truly... Wait for it...
    Well done!!
    I'll see myself out.

  • @seal1237
    @seal1237 3 месяца назад

    My very close aunt passed away from this. It was absolutely the worst thing to see her go through, and it killed us to see how quickly it robbed her motor skills, memory, speech, and just literally everything 💔 😢

  • @glennac
    @glennac 6 лет назад +17

    Question: Do paper toilet seat covers really do anything to protect the user from germs?

  • @PaulKruskamp
    @PaulKruskamp 6 лет назад +118

    How do you know if a cow has mad cow disease?
    It goes: "mmmmooooOOOOOOAAAAAAAAAHAHAHHAHAHHAHAH

    • @oneofmanyparadoxfans5447
      @oneofmanyparadoxfans5447 6 лет назад +5

      I'll have you know that a proper evil laugh ends with a sudden onset of coughing, thank you.

    • @gelfling
      @gelfling 4 года назад +1

      I remember that... Now I feel so old...

    • @klein2137
      @klein2137 4 года назад

      No, it's says "vaccines cause autism"

  • @Patzzia
    @Patzzia 5 месяцев назад

    This is really good information. Thank you very much

  • @spaceyjacey_
    @spaceyjacey_ 5 месяцев назад +1

    My grandma died of mad cow disease in the late 80’s. I of course never met her, but my dad told me what she passed away from when I was 5 or 6 and it never left my brain. Such a huge fear of mine.

    • @tyshawn8104
      @tyshawn8104 5 месяцев назад +1

      Same, I’m sorry for your loss.

  • @Bc232klm
    @Bc232klm 6 лет назад +32

    I thought prion was pronounced like ion?

    • @Yora21
      @Yora21 6 лет назад +7

      It's probably originally Greek or Latin. And English speakers always pronounce all foreign words wrong. You're free to choose which wrong version you want to use.

    • @Resseti82939
      @Resseti82939 6 лет назад +1

      No no no there two very different things

    • @Jeffrey314159
      @Jeffrey314159 6 лет назад +4

      Actually since it is a contraction or acronym of PROteinacious INfectious particle it should be spelled PROIN , but Prion rolls off the tongue better.
      There was an article about this in DISCOVER magazine many many years ago: The Game of the Name is Fame ~ about how the prion theory was bad science being over sold.

    • @cadeprutzman9771
      @cadeprutzman9771 6 лет назад

      cubs0110 potato patato

    • @Walker1o8o
      @Walker1o8o 6 лет назад

      It is.

  • @smithatkinson9962
    @smithatkinson9962 6 лет назад +4

    Holy Sh** . When I was a child I thought the Mad Cow Disease is a joke .LOL

  • @mariakasstan
    @mariakasstan Год назад +2

    The very thought that somwbody was feeding cows to cows is horrifying!

  • @francescakray233
    @francescakray233 11 месяцев назад

    Thank you. 🌹

  • @trinityrandt2333
    @trinityrandt2333 6 лет назад +4

    I did an entire project on this last year in biology. It was very interesting!

  • @furtivecat6895
    @furtivecat6895 6 лет назад +3

    Nice video I'm a government contracted scientist and my job is monitoring TSE in Ireland my lab actually developed the first detection method that made the eradication scheme possible, there was a positive this year in March and one the year before which was rather suspicious as it was a German animal that was recently bought at market, and Irish beer prices had only recovered to pre TSE levels.

  • @claytonpaisley9721
    @claytonpaisley9721 4 года назад +1

    My husbands uncle, Larry Paisley, made several important discoveries about mad cow that impacted modern policy and stopped the spread. It was the highlight of his career, RIP uncle Larry.

  • @Vizal
    @Vizal 4 года назад +2

    The thumbnail is a nice wink to the infamous Macromedia Flash applet 😜

  • @jorgelsala
    @jorgelsala 6 лет назад +24

    VCJD = Van Claude Jean Damme

  • @michelleherbert3058
    @michelleherbert3058 4 года назад +3

    I thought mad cow disease started with the Chemical Pour-ons most farmers were made to use by the governing meat bodies. One organic dairy farmer wasn't using the chemicles and his cattle tested negative for the disease after they were all slaughtered.....
    He then went on to get a very good understanding of what these chemicles do to the spines and nervous systems of cattle and made a link between the two. I can't remember his name but his story stuck with me all these years, his determination to find out after losing all his lovely cattle....

  • @gojosgirl6487
    @gojosgirl6487 6 лет назад +2

    When I first heard about this back in sixth grade, 2006, I was so freaked out that I flat out refused to eat ANY beef for like a year after that. I still don't order burgers from McDonald's

  • @Speak4Yourself2
    @Speak4Yourself2 4 года назад

    Thanks a lot!

  • @gustavgnoettgen
    @gustavgnoettgen 4 года назад +2

    My mom was very worried after 1998. She didn't like beef in the first place, and we avoided eating any beef products for five years or so.

  • @DuncanEllis
    @DuncanEllis 6 лет назад +63

    I moved to the US from the UK in 2001. I have not been able to give blood throughout that time.
    The funny thing is that I am a vegetarian.

    • @beezusHrist
      @beezusHrist 6 лет назад +5

      Duncan Ellis The disease can lie dormant for decades. Have you been a vegetarian all your life because if not, you probably ate tainted meat.

    • @user-bl4oq7fd8d
      @user-bl4oq7fd8d 6 лет назад +3

      There are tests for BSE since 2005 and since 2016 we can detect all forms of BSE.

    • @2ecember
      @2ecember 6 лет назад +1

      Irrelevant question but how was the move from the UK to the US?

    • @Ayverie4
      @Ayverie4 6 лет назад

      Duncan Ellis My husband was born in the UK and only lived there until like 6 months old. Maybe never even ate any food yet. But he still can't give blood.

    • @SuperStarwarsfan101
      @SuperStarwarsfan101 6 лет назад

      I once knew a girl in high school who also was from the U.S. and moved to the U.K. around the late 90s or early 00s and she also can't give blood, because she may have the disease.

  • @marcmarc172
    @marcmarc172 6 лет назад

    Stefan is my favorite scishow host!!!!!

  • @joeysmith7296
    @joeysmith7296 3 года назад +1

    Thanks i was scared of it but you calmed me down

    • @bnabna1012
      @bnabna1012 7 месяцев назад

      How did he calm u down?

  • @normalhuman9878
    @normalhuman9878 2 года назад +3

    My mom lived in Germany in the 90’s and she’s not allowed to donate blood

  • @francoislacombe9071
    @francoislacombe9071 6 лет назад +4

    I never understood how prions could be transmitted through food. We cook our food, and also animal feed, which denatures proteins. Proteins are digested, which breaks them apart. Undigested proteins are not absorbed by the intestines. And finally, the few such proteins that could make it into the blood stream would have to get through the brain blood barrier to reach the brain itself. That's quite a gauntlet for those prions have to run and I'm amazed that any can manage to go through all of it.

    • @Thebestusername-fy5sl
      @Thebestusername-fy5sl 6 лет назад +2

      The protein chains affected adopt a different tertiary folding structure. One in which the atoms actually take up less space than in the original thus leading to gaps and an overall spongey bulk material. Because this incorrect form is actually more energetically favorable it acts as a template or chaperone protein. nearby proteins of the same secondary polypeptide chain structure, naturally follow the influence of this new form and follow suit to adopt that same folded shape.The entropy of this interaction is wholly -ve meaning no effort is actually required to keep it going once its begun, so the change is spontaneous once infection occurs. Some of the first investigations into CJD were on a disease called Kuru. Tribes in papa new guinea had a tradition of eating the brain tissue of dead tribe members after their passing, but without cooking it. This lead to the incorrect, for our bodies needs anyway, but again energetically favorable structure getting into the body. Leading to degeneration. And killing alot of people.

  • @cathyshepard253
    @cathyshepard253 5 лет назад

    I work at a Plasma Donation Center and this is a real concern we ask people about. Thank you for pronouncing creutzfeldt jakob disease, I didn’t know how to say it properly.

  • @EarlSquirrelsonn
    @EarlSquirrelsonn 6 лет назад +1

    I remember it in primary school in Ireland. We had to stand on mats with disinfectant before we went into the classrooms and everything.

  • @RedstoneMaster78
    @RedstoneMaster78 6 лет назад +11

    Holy cow!

  • @ntt2478
    @ntt2478 6 лет назад +3

    "Almost definitely probably not." Love it. Your honor, the jury finds the defendant almost definitely probably not guilty.

  • @RangoliArtDesigns
    @RangoliArtDesigns 6 лет назад

    what great speech

  • @johnjacob688
    @johnjacob688 6 лет назад

    It's so weird, I was just talking to someone about this yesterday. We had a guy at work die from mad cow a while back at that's what sparked the conversation.

  • @MalcolmCooks
    @MalcolmCooks 4 года назад +5

    they made it illegal to grind up dead cows and feed them to living cows

  • @sorzin2289
    @sorzin2289 6 лет назад +4

    I remember this during the 90's, I was too scared to go to McDonald's

    • @wilfriedschuler3796
      @wilfriedschuler3796 3 года назад

      @Sorzin
      If you really want to know more about "The Macdonalds" check in youtube the old ballade from Scotland "The massacre of Glencoe, by the corries"
      Here the soup Campbells are massacring the Mc Donalds. Deserves them right.

  • @Tara........
    @Tara........ 8 месяцев назад +1

    I ate beef in the U.K. during the 90's. CJD has always been there at the back of my mind because it can take decades for the symptoms to appear. It's not something that keeps me up at night but every once in a while I can't help thinking about the possibility.

  • @johnwhite9760
    @johnwhite9760 6 лет назад

    for RUclips this was actually a very good little documentary. I'm a dairy farmer in the UK and thankfully my cows never had this dreadful disease.It's good it's now in the past.

  • @lowlyworm9323
    @lowlyworm9323 6 лет назад +7

    Only 90s kids remember

  • @RedstoneMaster78
    @RedstoneMaster78 6 лет назад +3

    It's a coincidence how I just learned about prion's today in school

  • @Novadolls
    @Novadolls 5 лет назад +1

    Ha, seeing this is a blast from the past, because Mad Cow Disease was a special interest of mine a few years back.

  • @DatTrueTruth
    @DatTrueTruth 6 лет назад +2

    my grandmother actually passed away in 2016 from mad cow disease. i don't think it's as rare as this video makes it out to be. No one knows how she got it but like the video says it can take years to actually show symptoms. Her doctor said it could be from a botox injection she had or from some steak she had eaten in Mexico.. however my aunt has known 2 people that have passed in the last 3 years from it. which leads me to believe it's likely more common than we want it to be. still incredibly rare but not that rare.

  • @lilMissAdoria
    @lilMissAdoria 6 лет назад +16

    They sought psychiatric help for their anger issues and have calmed down. 😂

    • @chrisduke3251
      @chrisduke3251 6 лет назад +1

      They were sent to anger management class.

  • @gordonlawrence4749
    @gordonlawrence4749 5 лет назад +5

    My first wife didn't need to worry about this - she was a mad cow already.

  • @innerspacesurfer
    @innerspacesurfer 6 лет назад

    "One thing we can say for sure is your steak is almost probably definitely not infected."That's some real good science talking. One day i hope i can science this good. Thanks for all the perspiration scishoe. Keep it up!

  • @ScarletAquaCrimson15
    @ScarletAquaCrimson15 6 лет назад +1

    I was making hamburgers yesterday and thought "I wonder what happened to mad cow disease?" then today this video popped into my feed! Mindblown! And thanks for answering that question!

  • @itsSebastianl0lz
    @itsSebastianl0lz 6 лет назад +8

    Here I am thinking cows go mad, when they eat tomacco
    My life is a lie

  • @thedrunkenpilot
    @thedrunkenpilot 5 лет назад +4

    I have a friend who drives a Prion, he's pretty douchey about it.

  • @wrenlittle8826
    @wrenlittle8826 2 года назад +1

    Ahh nostalgia. I vividly recall my time as Chefs apprentice in the mid nineties in Denmark. My 'Masters' frustration was comic. "No bone broth, no marrow soup, no brains, no no no no" Incessant grumbling.
    They were terribly disappointed with the farming industry.
    I love SciShow.

  • @kilowhiskyforge5713
    @kilowhiskyforge5713 6 лет назад

    Hey bro, I ain't seen you I this channel before but I dig how well you perform in front of a camera. Really well done. I would recommend practising your hand movement on camera. Try to include a bit more time bringing your hands together- clasping?- and then opening them up again during the key points and I believe that will make for a well rounded educational video. Cheers bro

  • @slowiez7209
    @slowiez7209 5 лет назад +4

    The new deer zombie disease brought me here.

  • @boy638
    @boy638 6 лет назад +3

    "U mad bruh"
    Moo...

  • @HenryPh_am
    @HenryPh_am 6 лет назад

    Love Stefan ❤️

  • @Tonguefunsome
    @Tonguefunsome 6 лет назад

    What a great placement for a Longhorn Steak House ad!