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. 2014 Jul 31;9(1):373. doi: 10.1186/1556-276X-9-373

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Copyright © 2014 Gurunathan et al.; licensee Springer.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited.

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Enhanced antibacterial effect of antibiotics in the presence of AgNPs. All test strains were treated for 4 h with sublethal concentrations of ampicillin or AgNPs, or combinations of AgNPs and ampicillin (A) or combinations of AgNPs and vancomycin (B). All test strains were treated for 4 h with sublethal concentrations of vancomycin or AgNPs, or combinations of AgNPs and vancomycin. Bacterial survival was determined at 4 h by the CFU assay. The results are expressed as the means ± SD of three separate experiments, each of which contained three replicates. Treated groups showed statistically significant differences from the control group by the Student's t test (p < 0.05).