A Good Diagram of How Antibiotic Resistance Evolves

Posted on March 10, 2007 by mikethemadbiologist

One of the little things I liked about Rick Weiss’ cefquinome article was a diagram about how antibiotic resistant strains evolve.


One of the confusing things about the evolution of resistance (and natural selection, for that matter) is the notion that the evolution of resistance happens among individuals within populations. This graphic from the Washington Post lays that out quite nicely:
GR2007030500018
It might be good for students too.

This entry was posted in Antibiotics, Education, Evolution, Microbiology. Bookmark the permalink.

19 Responses to A Good Diagram of How Antibiotic Resistance Evolves

  1. Steven says:
    March 10, 2007 at 12:27 pm

    Bacteria can pass resistance to each other via plasmids right?

  2. Mike the Mad Biologist says:
    March 11, 2007 at 10:26 am

    Steven,
    yes, but the rate of plasmid transfer is usually very low, so, in effect, it should be thought of as a funky kind of mutation. In other words, plasmid transfer isn’t infectious, in the way that a virus is.
    As with all things in biology, there are obviously exceptions.

  3. Sandra Porter says:
    March 13, 2007 at 1:12 pm

    There are chemical signals that increase the rate of plasmid transfer. I don’t know if antibiotics have this kind of effect, but I wouldn’t be surprised if some do.
    (I used to work on this – except the transfer was from bacteria to plants.)

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    July 18, 2008 at 9:15 am

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  5. erotik shop says:
    September 8, 2008 at 12:31 pm

    (I used to work on this – except the transfer was from

  6. seks shop says:
    September 8, 2008 at 12:36 pm

    There are chemical signals that increase the rate of plasmid transfer. I don’t know if antibiotics have this kind of effect, but I wouldn’t be surprised if some do.

  7. sex shop says:
    September 8, 2008 at 12:38 pm

    There are chemical signals that increase the rate of plasmid transfer. I don’t know if antibiotics have this kind of effect,

  8. vajina says:
    September 8, 2008 at 12:39 pm

    rate of plasmid transfer. I don’t know if antibiotics

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    September 8, 2008 at 4:39 pm

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  12. sex video says:
    February 17, 2009 at 5:11 am

    One of the confusing things about the evolution of resistance (and natural selection, for that matter) is the notion that the evolution of resistance happens among individuals within populations. This graphic from the Washington Post lays that out quite nicely:
    good job..

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    March 6, 2009 at 12:04 am

    thank you very much

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    March 8, 2009 at 4:06 pm

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    March 11, 2009 at 6:08 pm

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    November 11, 2010 at 5:47 am

    I recall reading an article that said the opening shots in the next world war would be in cyberspace, with dodgy spambots flooding the net.

Comments are closed.