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Home SCIENCE NEWS Chemistry AND Physics

Alternative therapies for mild infections could help combat antibiotic resistance

December 28, 2017
in Chemistry AND Physics
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Credit: oliver.dodd, Flickr

Resistance to antibiotics poses a serious and sometimes deadly challenge to the treatment of severe bacterial infections. In a new Essay publishing 28 December in the open access journal PLOS Biology, Kristofer Wollein Waldetoft and Sam P. Brown of Georgia Institute of Technology propose that development of alternative therapies for mild infections could help slow the development and spread of antibiotic resistance, thereby preserving the drugs' effectiveness for use in severe infections.

Antibiotic resistance occurs when bacterial pathogens change in ways that reduce the drugs' effectiveness and becomes a serious problem when these resistant strains multiply. Each year, over 20,000 people die from antibiotic-resistant infections in the U.S. alone. Most research to identify alternatives to antibiotics, such as bacteria-killing viruses, has focused on targeting bugs responsible for severe infections using alternative therapies. However, such efforts have met with limited success.

To identify approaches that might be more effective, Waldetoft and Brown reviewed previous studies of antibiotics use. They used an evolutionary framework to analyze data from these studies and determined that widespread use of antibiotics against certain mild infections may contribute significantly to the development of antibiotic resistance. This is, in part, because antibiotics can select for resistance in any bacteria present in a patient, not just in the target bug. And since many antibiotics operate in similar ways, a single antibiotic can promote resistance to many drugs. As a result, they concluded that research efforts to develop alternative therapies should shift focus from severe infections to milder ones.

The analysis suggests that alternative therapies for certain mild infections–which may be easier to develop–could indirectly slow development of antibiotic resistance in more dangerous bugs. This could help maintain the ability to use antibiotics against severe infections for which new drugs have been difficult to develop.

The authors note that development of non-antibiotic alternatives for mild infections is just one strategy to combat antibiotic resistance. Other strategies include shorter courses of antibiotic treatment and use of antibiotics that act against a narrower range of species.

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In your coverage please use this URL to provide access to the freely available article in PLOS Biology: http://journals.plos.org/plosbiology/article?id=10.1371/journal.pbio.2003533

Citation: Wollein Waldetoft K, Brown SP (2017) Alternative therapeutics for self-limiting infections–An indirect approach to the antibiotic resistance challenge. PLoS Biol 15(12): e2003533. https://doi.org/10.1371/journal.pbio.2003533

Funding: The Simons Foundation https://www.simonsfoundation.org/ (grant number 396001). The CDC https://www.cdc.gov/ (grant number OADS-2016-N-17812). The Wenner-Gren Foundations http://www.swgc.org/. The Royal Physiographic Society of Lund https://www.fysiografen.se/en/. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.

Competing Interests: The authors have declared that no competing interests exist.

###

Media Contact

Kristofer Wollein Waldetoft
kristofer.wolleinwaldetoft@biology.gatech.edu

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Related Journal Article

http://dx.doi.org/10.1371/journal.pbio.2003533

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