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Koch's Postulates 

Biology Professor
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Biology Professor (Twitter: @DrWhitneyHolden) describes Koch's Postulates that are used to identify which pathogen causes a disease. Exceptions and other caveats with these postulates are also discussed. Great for AP Biology and MCAT Biology Review!

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9 июн 2024

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Комментарии : 203   
@mymusic7008
@mymusic7008 3 года назад
It's really helpful in my studies... Lots of respect from India 🇮🇳
@ty_hens
@ty_hens 3 года назад
So straight to the point and informative while providing some assessment on the subject. Literally a perfect tutorial video.
@christine1401
@christine1401 3 года назад
Your videos deserve more recognition ma’am. Thank you for this!
@BiologyProfessor
@BiologyProfessor 3 года назад
Thank you so much!
@matthewsheats1880
@matthewsheats1880 7 лет назад
TY for the clear cut version.
@jessicahancock3901
@jessicahancock3901 7 лет назад
Thank you very much for this video, it has given me a good understanding of Koch's Postulates.
@jishnuroy5001
@jishnuroy5001 3 года назад
Thank you mam, for clearing out my doubts.
@amberbenton7658
@amberbenton7658 3 года назад
Thank you for your videos! They are very helpful!!
@michaelkwofie150
@michaelkwofie150 2 года назад
I never thought I could understand Koch's postulates until I met you ❤️
@BiologyProfessor
@BiologyProfessor 2 года назад
I’m glad you found me then! ;)
@johanatrujillo5521
@johanatrujillo5521 4 года назад
Absolutely love your videos.
@sridharkrishnaswami5221
@sridharkrishnaswami5221 2 года назад
Excellent Presentation by the Speaker
@faizal3882
@faizal3882 9 лет назад
covered everything i needed. thank you
@jonathanc1084
@jonathanc1084 4 месяца назад
Thank you! Great teacher and, on top of that beautiful and charismatic.💌
@hamzawajid805
@hamzawajid805 8 лет назад
Thank you, great job.
@Mariiiam
@Mariiiam 2 года назад
THANK YOU PROFESSOR!
@OVERDOSE
@OVERDOSE 8 лет назад
That was amazing! The problems pertaining to the postulates were exactly what I was looking for. Keep up the good work! Cheers,
@Katie404x
@Katie404x 8 месяцев назад
Thank you for simplifying it
@mohdajaz2703
@mohdajaz2703 3 года назад
I think this Fill in the blanks method is unique and easy to understand.Thank you👍🙏
@BiologyProfessor
@BiologyProfessor 3 года назад
Thanks! I enjoy teaching this way.
@ernie8497
@ernie8497 4 года назад
Hi Dr. Whitney, is there anyway to contrast Koch’s postulates with the microbial damage and host response framework?
@mbalixsibiya
@mbalixsibiya Год назад
How do we find the bacterium in every case of disease
@shyama5612
@shyama5612 3 года назад
Wonderful explanation A variation of this for viruses is called Rivers criteria FYI.
@BiologyProfessor
@BiologyProfessor 2 года назад
Yes, thank you for pointing this out. The work of Rivers is mentioned here: www.nature.com/articles/423240a
@patriciadisney8371
@patriciadisney8371 8 лет назад
Thanks, great video!
@sandeepsahu8090
@sandeepsahu8090 Месяц назад
Excellent ma'am
@simonmeehan362
@simonmeehan362 3 года назад
Lovely job! Thank you so much
@BiologyProfessor
@BiologyProfessor 3 года назад
Thanks :)
@wraithdefilerjj1039
@wraithdefilerjj1039 3 года назад
Thanks for the clear explanation! :)
@BiologyProfessor
@BiologyProfessor 3 года назад
You are welcome!
@rockysidhu2510
@rockysidhu2510 4 года назад
Splendid video for learning
@syednizba7577
@syednizba7577 3 года назад
Thank you so much... U helped me a lot through this explanation.. Tqq
@MOH-hw2fl
@MOH-hw2fl 9 лет назад
Thank you so much 👍
@jadelynstevens4760
@jadelynstevens4760 2 года назад
This was very helpful thank you!
@BiologyProfessor
@BiologyProfessor 2 года назад
Glad it was helpful!
@Lifescience7cPGp
@Lifescience7cPGp 2 года назад
Thank you ma'am
@BiologyProfessor
@BiologyProfessor 2 года назад
You are welcome
@naveedahmad4498
@naveedahmad4498 5 лет назад
Your teaching method so easy 👉 💪
@stevecarter7612
@stevecarter7612 4 года назад
Really liked this video it really helped! Thank you! I have a question though - With the problems of Koch's postulates you mentioned meaning it can't be used to establish this casual relationship, is there a newer model that we follow instead? Or is Koch's postulates still used but "with a pinch of salt"?
@BiologyProfessor
@BiologyProfessor 3 года назад
There are new kinds of evidence, like PCR tests. When thousands of people test positive for a specific sequence of viral DNA, and the transmission chain from person to person can be observed, and treatments for that virus that work in vitro also work in patients, it’s pretty clear what’s going on.
@BiologyProfessor
@BiologyProfessor 3 года назад
That is misinformation that has been spreading, unfortunately. www.google.com/amp/s/in.mobile.reuters.com/article/amp/idUSKBN24420X
@MusicMixes100
@MusicMixes100 3 года назад
@@BiologyProfessor Not completely though, I found an interview of Kary Mullis in which he said that testing with PRC doesnt mean the thing you are testing for made you sick or will hurt you per definition. its just an amplification of molocules, and if you amplicate the right ones often enough you can find almost any common strain of bacteria or virus. Even when those virusses are already dead we still carry "prints" on our genomes and/or DNA. So basically high infection rates depend on how many cycles of amplification you use. So in his words, you cant mis use PCR, you can only interpet it wrong.
@BiologyProfessor
@BiologyProfessor 3 года назад
It’s true that it could be interpreted incorrectly. That’s why it is only one type of evidence to be used. Using epidemiology to track transmission structure, using animal models to do infection studies, using PCR on people with and without symptoms, etc. all give a fuller picture of Disease.
@sridharkrishnaswami5221
@sridharkrishnaswami5221 2 года назад
Very Easy to learn
@Morrowindur
@Morrowindur 4 года назад
Not one of these postulates is satisfied for SARS-CoV 2!
@joewong6662
@joewong6662 4 года назад
Morrowindur and cOVID-19
@be_rt
@be_rt 4 года назад
low key, for none of the "virusses". Virology is dogma.
@agokllani
@agokllani 4 года назад
Can’t test it on human via injecting them as it’s unethical but can inject with with vaccines that contain the virus lol
@gwat34
@gwat34 3 года назад
@@be_rt This guy gets it. It's sad most don't realize this about germ and viral theory. All dogma, no science.
@amadeusb4
@amadeusb4 3 года назад
You didn't watch this video to the end did you? Try that next time.
@carlrichieukmusic
@carlrichieukmusic Год назад
Virus Mania book also explains this well
@SagrikaOberoi
@SagrikaOberoi 4 года назад
Loved your lecture ..love from india 😊❤
@janpowell7536
@janpowell7536 4 года назад
They need to do this for Covid 19 to prove what it is and if it exists
@matafiyd
@matafiyd 3 года назад
Is this for bacteria only or virus’s and bacteria?
@BiologyProfessor
@BiologyProfessor 3 года назад
Any pathogen, though some (like viruses) can’t be grown in pure culture. Koch didn’t know about viruses when he developed his Postulates.
@stevebilliter
@stevebilliter 3 года назад
@@BiologyProfessor You can also use Rivers modifications from 1937, which has overlap with Koch's. There is no proof that any virus has been isolated--that has to be done, because a virus us still a pathogen if it exists at all--I see no proof that any virus exists--nor any proof of contagion--where's the studies? It appears that Pasteur's germ theory is incorrect, and terrain theory is correct.
@parasdev4478
@parasdev4478 4 года назад
Thanks a lot...😊😊
@StevePhillips
@StevePhillips 2 года назад
Finally I understand Koch's postulates in microbiology.
@BiologyProfessor
@BiologyProfessor 2 года назад
Great! :)
@bzippo
@bzippo 8 лет назад
thanks this helped me with my homework
@gearsb.8279
@gearsb.8279 7 лет назад
This video really help me but i got a question, from what i learned, isn't it better to use susceptible animals rather than healthy one since the patient that we got pathogen from might not be in healthy state too??
@BiologyProfessor
@BiologyProfessor 7 лет назад
This is an interesting question. For the purpose of Koch's Postulates, with the goal of proving conclusively that a certain microbe causes a certain disease, it is important to use a healthy animal subject. However, I could accept the argument that, for certain microbes only capable of establishing diseases in an already unhealthy host (one with a weakened immune system, for example), that a more susceptible host with a weaker immune system might be necessary for disease symptoms to appear. This will normally not be the case though. Thanks for asking!
@crawlbitchcrawl
@crawlbitchcrawl Год назад
❤thanks!!
@muhammedhisham9016
@muhammedhisham9016 5 лет назад
Helped a lot
@hj86.10
@hj86.10 4 месяца назад
Thank u ms
@MarykMakwelele
@MarykMakwelele 5 дней назад
Impressed ❤
@marydulay5651
@marydulay5651 3 года назад
Hoping all discussions would be this Short but detailed 😊😊 thanks for the video 'twas a big help
@BiologyProfessor
@BiologyProfessor 3 года назад
You are welcome! I try to keep it short and sweet. ✅
@user-el6mt5gh5c
@user-el6mt5gh5c Год назад
Your helpful thnks 😊
@harshpise3395
@harshpise3395 5 лет назад
Thanks mam...
@martingasper8860
@martingasper8860 3 года назад
Thanks U❤️
@knowledgebone109
@knowledgebone109 9 лет назад
nice informative video
@joselynsalabsab6827
@joselynsalabsab6827 2 года назад
Thanks
@BiologyProfessor
@BiologyProfessor 2 года назад
No problem :)
@swapnilrokade229
@swapnilrokade229 2 года назад
Thank you mam🤞
@BiologyProfessor
@BiologyProfessor 2 года назад
Most welcome 😊
@Maremare680
@Maremare680 9 лет назад
Your videos are very good, sadly, the volumen is always low.
@mckenna8663
@mckenna8663 7 лет назад
What is the point of step 4? If 1-3 are true and done correctly - and if the previously healthy unaffected host gets the disease.... is that not proof enough? What does step 4 prove BEYOND steps 1-3?
@BiologyProfessor
@BiologyProfessor 7 лет назад
It is kind of like a double check to make sure that the bacterium you injected into the host in step 3 really did infect the host and grow and replicate to cause disease.
@mckenna8663
@mckenna8663 7 лет назад
Biology Professor ok... thanks I'm really enjoying your Channel. You have helped me understand microbiology quite a bit
@BiologyProfessor
@BiologyProfessor 7 лет назад
Awesome! That's great to hear!
@sandisonkosi9835
@sandisonkosi9835 8 лет назад
thanks
@kombuchababy6542
@kombuchababy6542 Год назад
A virus is an "obligate intercellular PARASITE?" In that case, would anti-parasite drugs be helpful? Or does "parasite" simply describe a mechanism similar to but not the same as an actual parasite?
@BiologyProfessor
@BiologyProfessor Год назад
It’s intracellular (replication inside cells), not intercellular (between cells). And here, we are using the basic definition of a parasite: something that lives in or on its host and steals nutrients from that host, to the benefit of the parasite and the detriment of the host. Anti-parasitic medication‘s are typically not going to work against viruses, because anti-parasitic medications are designed to treat eukaryotic parasites, like protozoans or helminthic worms. Antiviral medications are developed to target viruses specifically.
@kombuchababy6542
@kombuchababy6542 Год назад
@@BiologyProfessor Thank you!
@NatalieWanGG
@NatalieWanGG 11 месяцев назад
Why should we isolate the bacteria from the host?
@iammynameischris7228
@iammynameischris7228 3 года назад
you had a strong start , . .
@AsifAsif-yw5sh
@AsifAsif-yw5sh 4 года назад
Nice and good
@kobemofid3960
@kobemofid3960 4 года назад
Thank you very much but I want to know some of the pathogens that can infect humans but not animals ?
@BiologyProfessor
@BiologyProfessor 4 года назад
Bordetella pertussis is an example of a bacterium that only affects humans not animals. HIV is an example of a virus that only affects humans.
@FeFabregas
@FeFabregas 4 года назад
@@BiologyProfessor So How can we prove HIV causes AIDS? Is there any postulate better than Koch's?
@johnparadise3134
@johnparadise3134 3 года назад
Does this apply to viruses as well as bacteria?
@tioh2001
@tioh2001 3 года назад
She answers this near the end of the video...and the answer is no.
@jordankoch6742
@jordankoch6742 6 лет назад
Thank you for pronouncing my name right
@BiologyProfessor
@BiologyProfessor 6 лет назад
Haha, you're welcome. :)
@gmw405
@gmw405 4 года назад
Does this not relate to virus then since virus is not bacteria ?
@BiologyProfessor
@BiologyProfessor 3 года назад
This does not apply to viruses. Koch developer these postulates before the discovery of viruses. Viruses cannot be grown in pure culture.
@stevebilliter
@stevebilliter 3 года назад
@@BiologyProfessor They put Vero cells and an antibiotic in the purification process and faked finding CV 19--viruses cannot grow in culture because none exist. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-IoywNPXANi4.html Andrew Kaufman M.D. - The Rooster in the River of Rats - Koch's Postulates (35 min) He shows exactly how the pandemic got started and brings the details of the studies out to view and reveals the fraud.
@abhihepat848
@abhihepat848 4 года назад
Which country?
@johnparadise3134
@johnparadise3134 3 года назад
Are these four criteria still valid today? They were first established in the 1800s? I bet they are, but I’m just asking.
@BiologyProfessor
@BiologyProfessor 2 года назад
I go over some of the problems and caveats, starting at 4:04
@jeannette_sanchez
@jeannette_sanchez 8 лет назад
The volume is so incredibly low
@BiologyProfessor
@BiologyProfessor 7 лет назад
I've updated my recording equipment since this video was made; my new videos are much better sound.
@jacobhenson6360
@jacobhenson6360 5 лет назад
Jeannette S turn it up then
@lailamohd9267
@lailamohd9267 7 лет назад
The volume is extremely low, other than that this video helped me a lot .
@BiologyProfessor
@BiologyProfessor 7 лет назад
I've updated my recording equipment since this video was made; my new videos are much better sound.
@ohlottie
@ohlottie Год назад
It also doesn’t feel ethical to me to purposely inflict animals with disease.
@rajdeepdas3211
@rajdeepdas3211 2 года назад
❤️
@NFLbeatster
@NFLbeatster Год назад
Mark and Scott Kelly along with Aaron Rodgers are at the center of this all. And Adam Scott was cast on Severance because of the name disguise... As for COVID, that's Aaron Rodgers' middle name
@tahirtantary7438
@tahirtantary7438 5 лет назад
Nice ...love u madam
@user-ip9lw8wq4o
@user-ip9lw8wq4o 2 года назад
😍😍beauty with brain
@BiologyProfessor
@BiologyProfessor 2 года назад
Thanks :)
@user-ip9lw8wq4o
@user-ip9lw8wq4o 2 года назад
@@BiologyProfessor always welcome 🥰keep uploading such kind of vedios
@mistful808
@mistful808 5 лет назад
i can't hear anything. i could be going deaf
@sridharkrishnaswami5221
@sridharkrishnaswami5221 2 года назад
Cheer up Madam
@MrLaughs4you
@MrLaughs4you 7 лет назад
is it ethical to do step number 3 to people who are on death row
@BiologyProfessor
@BiologyProfessor 7 лет назад
I suppose it would depend on whom you ask.
@americanbee
@americanbee 7 лет назад
Not in every situation this can be done! It was considered before, but not now. For ex they don't experiment with syphilis
@rubycastillo6655
@rubycastillo6655 7 лет назад
Who's here for Professor Ndeta Microbiology class? University of Rio Grande Valley? lol
@2NDFLB
@2NDFLB 3 года назад
* What's your favorite color ? *
@han708
@han708 4 года назад
Roses are red, violets are blue, I have biology and so do you
@feat.shanika
@feat.shanika 3 года назад
Who else is here before the exam
@BiologyProfessor
@BiologyProfessor 3 года назад
Hope it went well!
@alexanderpadalka5708
@alexanderpadalka5708 4 года назад
🗽
@klarageist413
@klarageist413 3 года назад
Please in German Translation
@livelylemongrass
@livelylemongrass 7 лет назад
it's also unethical to inject animals with pathogens
@BiologyProfessor
@BiologyProfessor 7 лет назад
Some people would agree with you, others would not. It is kind of a gray area, I suppose. Thanks for commenting!
@pandorasmind4735
@pandorasmind4735 6 лет назад
It is not Really.... it is unethical to inject a patient something without taking consent or giving them enough info about the injection. it is unethical to talk about patients privacy outside the working premise. but it is not unethical to inject an animal with pathogens in my eyes, because first of all, it does not the brain capacity or self consciousnesses to be aware of what is actually happening. You might argue, "But what if there is a human in a coma, they dont have the brain Capacity or self Consciousness". And to that is say, but that is not the default state of a normal human beings. Humans are classified as Animals but we are the superior to other Animals due to our Brain, and we cannot treat both the same. Therefore, we do have to respect a human's decision and privacy, and we should not treat animals in the same way. I do agree that animal testing is bad, but that is "Empathy" and not "Ethics". Ethics is simply a set of rules that separates the right from the wrong. And animal testing according to Ethics is not wrong if you really thing about it.
@sridharkrishnaswami5221
@sridharkrishnaswami5221 2 года назад
German Mictobiologist
@onefromtheotherside
@onefromtheotherside 8 лет назад
owwo. you are cute!
@Hip-Gnosis1134
@Hip-Gnosis1134 4 года назад
But but but..... covid-19 is special!
@somethingstrange7184
@somethingstrange7184 3 года назад
Well yeah it’s a virus not a bacteria
@jeneway1
@jeneway1 3 года назад
It's a pathogen so this would still apply
@baghiballsakh82
@baghiballsakh82 3 года назад
Well, covid 19 is a disease, and the virus that causes covid 19 is called SARS-CoV-2. @@jeneway1 Viruses won't replicate in pure culture so this particular process wouldn't apply.
@moderngames3837
@moderngames3837 4 года назад
I love u mam .u are so so cute
@berfindogan8780
@berfindogan8780 3 года назад
Valla çok haksızlık hiçbir yerde Türkçe yok ,koch postulati
@BiologyProfessor
@BiologyProfessor 2 года назад
Very sorry, but I do not speak Turkish.
@realest_shirts
@realest_shirts 2 года назад
Uhhhh.. COVID?????????????????????!!!!!!!!!!
@BiologyProfessor
@BiologyProfessor 2 года назад
auckland.ac.nz/en/news/2020/11/16/kochs-postulates-covid-and-misinformation-rabbit-holes.html
@chickstar69duplicity35
@chickstar69duplicity35 4 года назад
Omg just get on with it pleeeease
@231mac
@231mac 3 года назад
You flunk a lot, huh?
@chickstar69duplicity35
@chickstar69duplicity35 3 года назад
@@231mac with a comment such as that I would suggest you probably are the one who flunks, as you put it. I never have 🤣🤣
@231mac
@231mac 3 года назад
@@chickstar69duplicity35 That _really_ doesn't make any sense. At all. Ever. Could you please elaborate on how you came to hypothesis that bit of learned wisdom? Oh, and use more emojis next time! They really accentuate the height of your intellect! Wow oh wow, we're dealing with a Grand Master over here!!!
@chickstar69duplicity35
@chickstar69duplicity35 3 года назад
@@231mac hypothesis is a noun btw
@231mac
@231mac 3 года назад
@@chickstar69duplicity35 You're completely right, I meant to write 'hypothesize'. Now, with your inability to capitalize, or to even utilize basic punctuation skills, we'll call it even. 😉
@SonOfJ
@SonOfJ 2 года назад
Funnily enough, all of these pronunciations are wrong, but don't bother trying to pronounce it right cause it's a germanic sound which is way too hard to pronounce for English speakers. Same as van Gogh, it's simply too weird of a sound for people who don't speak a germanic language.
@BiologyProfessor
@BiologyProfessor 2 года назад
Fair enough. I did my best. :)
@SonOfJ
@SonOfJ 2 года назад
@@BiologyProfessor Exactly, and that's what counts!
@BiologyProfessor
@BiologyProfessor 2 года назад
Yes :)
@omkardole1395
@omkardole1395 4 года назад
WATED MY TIME.... USELESS
@Hip-Gnosis1134
@Hip-Gnosis1134 4 года назад
How so? Literally explains what Koch’s postulates is and how to apply it. Maybe rewatch?
@chickstar69duplicity35
@chickstar69duplicity35 4 года назад
Who cares about pronunciation!!
@virtuality400
@virtuality400 2 года назад
can you make a video on the limitation of koch postulates 🥹😭
@BiologyProfessor
@BiologyProfessor Год назад
I discuss the limitations in this video you commented on, starting about 4:05.
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