New research: Antibiotic resistance is ancient
| September 22, 2011 | Posted by News under Evolution, Intelligent Design, News |
From Nature (September 22, 2011), here:
Antibiotic resistance is ancient
The discovery of antibiotics more than 70?years ago initiated a period of drug innovation and implementation in human and animal health and agriculture. These discoveries were tempered in all cases by the emergence of resistant microbes1, 2. This history has been interpreted to mean that antibiotic resistance in pathogenic bacteria is a modern phenomenon; this view is reinforced by the fact that collections of microbes that predate the antibiotic era are highly susceptible to antibiotics3. Here we report targeted metagenomic analyses of rigorously authenticated ancient DNA from 30,000-year-old Beringian permafrost sediments and the identification of a highly diverse collection of genes encoding resistance to ß-lactam, tetracycline and glycopeptide antibiotics. Structure and function studies on the complete vancomycin resistance element VanA confirmed its similarity to modern variants. These results show conclusively that antibiotic resistance is a natural phenomenon that predates the modern selective pressure of clinical antibiotic use.
And not a result of Darwinism in action right before our eyes (!) after all.
In fact, the last time we saw Darwinism in action right before our eyes was the evolution of the Corvette (aka Berra’s blunder).
13 Responses to New research: Antibiotic resistance is ancient
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Actually it’s entirely Darwinian. A small genetic change having an impact on survival.
Perhaps you were thinking it is just microevolution.
Notes:
Actually, to be Darwinian, it needs to be demonstrated that it was via blind, undirected chemical processes…
You can start with a unicuture — a single cell — and gradually increase the concentration of antibiotic. You can track the mutations and judge whether there is foresight.
as to the ‘randomness’ of mutations to DNA:
Revisiting the Central Dogma in the 21st Century
James A. Shapiro
Excerpt: Genome change arises as a consequence of natural genetic engineering, not from accidents. Replication errors and DNA damage are subject to cell surveillance and correction. When DNA damage correction does produce novel genetic structures, natural genetic engineering functions, such as mutator polymerases and nonhomologous end-joining complexes, are involved. Realizing that DNA change is a biochemical process means that it is subject to regulation like other cellular activities. Thus, we expect to see genome change occurring in response to different stimuli (Table 1) and operating nonrandomly throughout the genome, guided by various types of intermolecular
contacts (Table 1 of Ref. 112). These expectations open up new ways of thinking about the role of natural genetic engineering in normal life cycles and the potential for nonrandom processes in evolution.
http://docs.google.com/viewer?.....uXLSuXAB0Q
So you’re trying to overthrow evolutionary concepts with a paper describing evolutionary concepts?
Yep, that’s the key point that creationists always forget about when they say “resistance was always present, selection just increased the frequency. In experiments with isolated monocultures the initial frequency of resistance was 0 with complete certainty.
correction, meant to say:
Yep, that’s the key point that creationists always forget about when they say “resistance was always present, selection just increased the frequency.” In experiments with isolated monocultures the initial frequency of resistance was 0 with complete certainty.
Right and mutations that confer resistance are not random witrh respect to fitness as they ensure it.
That is the key point that evolutionitwits always forget.
Judge? I know how you “judge” they are blind and undirected- they just are!
Dude, go read Luria-Delbruck. Your statement is testable and has been found to be wrong.
NickMatzke_UD, does it not strike you as even the least bit odd that even though neo-Darwinian mutations can be shown to be historically contingent (random) in certain contexts that the mutations are still not truly ‘accidental’ mutations, and thus truly random ‘Darwinian’ mutations, but are in fact found to be mutations that are the result of ‘natural genetic engineering’
Nick, these ‘naturally’ engineered mutations, should, far from providing comfort to your neo-Darwinian atheism, send a cold shiver down your spine, because this ‘natural genetic engineering’, that Shapiro has clearly illustrated in his paper, is exactly the type of finding one would expect to see if organisms were indeed Designed to use their unmatched, and extremely sophisticated, computational abilities to ‘calculate’ correct molecular responses to varying environmental pressures. This is definitely not something we would expect to see from a neo-Darwinian perspective!!!:
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