Mutations - selection: the bacteria resist

http://www.evolution-of-life.com
Filmmaker: Yannick Mahé / Production: CNDP (2009)
A young medical assistant is giving a nice presentation about the principles of evolution. The genetic information of each living being is subject to modifications. Mutations can lead to bacterial resistance towards antibiotics. When in contact with the antibiotic, the resistant bacteria will be the only ones to survive, multiply, spread all over and finishing up to be a big problem for medicine.

Category:

Education

Tags:

• evolution
• mutation
• selection
• DNA
• bacteria
• antibiotic
• resistance

[borismex]

Hi there! Can I upload a spanish-subtitled version of the video?

[evolutionoflife09]

@borismex Contributions are welcome. So best is you contact us via the official web site of "Evolution-of-life" and we can then arrange how to upload the spanish-subtitled version on this youtube channel.

[jimshelnutt]

Note that the bacteria was already resistant to the antibiotic. No evolution there.

[evolutionoflife09]

@jimshelnutt At time "adding antibiotic" it is resistant, but at time "before mutation giving resistance" it wasn't!!! If this mutation hasn't occured when you add the antibiotic than the bacteria won't survive, but those of the bacteria that had a mutation turning them resistant are surviving...so there is evolution!!!

[ortcloud99]

the part about the mutation forming from dna nucleotide error is not correct.

[evolutionoflife09]

@ortcloud99 well it's the way mutations occur! So please specify what you think is not correct...

[blendaire]

@jimshelnutt That's what evolution is. The environment changes, and anything that survives gets to pass on it's genetic code. The new population in now resistant to whatever change happened. A creature does not evolve, a population does.

[azamar92]

the bacteria done a sponteneous mutation?

[Digiscat]

All-be-it I feel like something is wrong in the video ( Though I cant find anything. ) I'd like to add something incase theres a nut-job out there...When the DNA 'evolves' it usually degrades something. Theres dozens (Hundreds? thousands? Not sure on numbers.) of bacteriologists making these 'super bugs' and each time they succeed, the bacteria usually die off in a regular setting, since he mutation helped resistance and lowerd something else, like skill points in a game. :P

[procritic09]

@jimshelnutt The mutation caused the bacteria to be resistant to the antibiotic. Because the environment favoured that bacterium, it could survive to reproduce. It's really quite simple, and it is evolution. 

[TheYipedo]

@jimshelnutt The bacteria had a mutation in his DNA, and in this case, it was beneficial for it because it developed resistance to the antibiotic. This is especially frequent among bacteria because they multiply so rapidly. Random genetic mutation is one of the mechanisms of evolution along with natural selection (non-random) and genetic drift (random).

[dbrooks12009]

OMG this video had me laughing sooo hard! Its really a great video. Love it! Love it! Love it!! Very good teaching tool.