Pervasive selection for and against antibiotic resistance in inhomogeneous multistress environments

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Pervasive selection for and against antibiotic resistance in inhomogeneous multistress environments

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Title: Pervasive selection for and against antibiotic resistance in inhomogeneous multistress environments
Author: Chait, Remy; Palmer, Adam C.; Yelin, Idan; Kishony, Roy

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Citation: Chait, Remy, Adam C. Palmer, Idan Yelin, and Roy Kishony. 2016. “Pervasive selection for and against antibiotic resistance in inhomogeneous multistress environments.” Nature Communications 7 (1): 10333. doi:10.1038/ncomms10333. http://dx.doi.org/10.1038/ncomms10333.
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Abstract: Antibiotic-sensitive and -resistant bacteria coexist in natural environments with low, if detectable, antibiotic concentrations. Except possibly around localized antibiotic sources, where resistance can provide a strong advantage, bacterial fitness is dominated by stresses unaffected by resistance to the antibiotic. How do such mixed and heterogeneous conditions influence the selective advantage or disadvantage of antibiotic resistance? Here we find that sub-inhibitory levels of tetracyclines potentiate selection for or against tetracycline resistance around localized sources of almost any toxin or stress. Furthermore, certain stresses generate alternating rings of selection for and against resistance around a localized source of the antibiotic. In these conditions, localized antibiotic sources, even at high strengths, can actually produce a net selection against resistance to the antibiotic. Our results show that interactions between the effects of an antibiotic and other stresses in inhomogeneous environments can generate pervasive, complex patterns of selection both for and against antibiotic resistance.
Published Version: doi:10.1038/ncomms10333
Other Sources: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4735756/pdf/
Terms of Use: This article is made available under the terms and conditions applicable to Other Posted Material, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#LAA
Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:26318554
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