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Dr.GH



Posts: 1950
Joined: May 2002

(Permalink) Posted: Nov. 27 2011,11:06   

"Acceleration of Emergence of Bacterial Antibiotic Resistance in Connected Microenvironments" Qiucen Zhang, Guillaume Lambert, David Liao, Hyunsung Kim, Kristelle Robin,  Chih-kuan Tung, Nader Pourmand, Robert H. Austin, Science 23 September 2011: Vol. 333 no. 6050 pp. 1764-1767

Quote

It is surprising that four apparently functional SNPs should fix in a population within 10 hours of exposure to antibiotic in our experiment. A detailed understanding of the order in which the SNPs occur is essential, but it is unlikely that the four SNPs emerged simultaneously; in all likelihood they are sequential. The device and data we have described here offer a template for exploring the rates at which antibiotic resistance arises in the complex fitness landscapes that prevail in the mammalian body. Furthermore, our study provides a framework for exploring rapid evolution in other contexts such as cancer.



Multi-site mutations, functional mutations, 4 in TEN HOURS that replace within the population (~20 generations), why sequential mutations are functional, and more likely, and with medical applications.

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"Science is the horse that pulls the cart of philosophy."

L. Susskind, 2004 "SMOLIN VS. SUSSKIND: THE ANTHROPIC PRINCIPLE"

   
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