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'Resuscitating' antibiotics to overcome drug resistance

Date:
March 27, 2012
Source:
Society for General Microbiology
Summary:
Combining common antibiotics with additional compounds could make previously resistant bacteria more susceptible to the same antibiotics. 'Resuscitation' of existing antibiotics has the potential to make infections caused by multidrug-resistant bacteria easier to control, reducing antibiotic usage and levels of antimicrobial resistance, say scientists.
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Combining common antibiotics with additional compounds could make previously resistant bacteria more susceptible to the same antibiotics. 'Resuscitation' of existing antibiotics has the potential to make infections caused by multidrug-resistant bacteria easier to control, reducing antibiotic usage and levels of antimicrobial resistance, say scientists who recently presented their work at the Society for General Microbiology's Spring Conference in Dublin.

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Researchers from University College Dublin (UCD) studied a variety of bacteria that are frequently associated with hospital-acquired infections, including Pseudomonas, Klebsiella, Enterobacter and Staphylococcus. Bacterial samples were collected from hospital patients and from these, strains that showed resistance to a commonly prescribed antibiotic -- ciprofloxacin -- were selected for study.

The team tested ciprofloxacin in combination with one of five different 'adjuvant' compounds against these bacteria, to determine which combinations, if any, were more effective than treatment with ciprofloxacin alone. Results showed that all five adjuvant compounds increased the efficacy of ciprofloxacin; making it more active against the bacteria by up to six-fold. .

Dr Marta Martins, from the UCD School of Public Health, Physiotherapy and Population Science, who is leading the study explained why this adjuvant therapy approach is so important. "Antimicrobial resistance is a growing problem that is threatening to make many infections impossible to treat. There are very few new antibacterial drugs coming onto the market so it is vital that we find ways to extend the use of existing antibiotics as much as possible," she said. "Adjuvant therapy essentially means that antibiotics that are currently ineffective can be 'resuscitated' to treat infections that previously would have been considered resistant."

The team believes that adjuvant therapy could revolutionize the way that antibiotics are used nowadays. "Hopefully this work will allow antibiotics to be incorporated into treatment regimes and administered in more effective ways," said Dr Martins. "As well as extending the lifespan of current antibiotics, this approach could ultimately reduce levels of antimicrobial resistance in hospitals as well as in the community, allowing hard-to-treat bacterial infections to be successfully controlled," she said.

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Materials provided by Society for General Microbiology. Note: Content may be edited for style and length.


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Society for General Microbiology. "'Resuscitating' antibiotics to overcome drug resistance." ScienceDaily. ScienceDaily, 27 March 2012. <www.sciencedaily.com/releases/2012/03/120327215953.htm>.
Society for General Microbiology. (2012, March 27). 'Resuscitating' antibiotics to overcome drug resistance. ScienceDaily. Retrieved October 19, 2022 from www.sciencedaily.com/releases/2012/03/120327215953.htm
Society for General Microbiology. "'Resuscitating' antibiotics to overcome drug resistance." ScienceDaily. www.sciencedaily.com/releases/2012/03/120327215953.htm (accessed October 19, 2022).

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