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- W2318387825 abstract "Antibiotic resistance in pathogenic bacteria is emerging as an issue of serious concern in bio-medical research as well as food and health organizations. Metal complexes are currently being employed in medical devices for their inhibition to bacterial adherence and antibacterial activities. The primary aim of this study was to evaluate the antibacterial activities of pure metals, including selenium, germanium and lithium on planktonic cultures and biofilms of three bacterial species: S. aureus SH1000, P aeruginosa PA01 and E. coli. O157:H7. The antagonistic effects of selenium, germanium and lithium on these three bacterial species were examined using zone of inhibition assay. The minimum inhibitory concentrations and minimum bactericidal concentrations of antibiotics (rifampicin, mupirocin and ciprofloxacin) and metals (selenium, germanium and lithium) were measured. The minimum biofilm eradication concentrations (MBEC) of metals were determined against biofilms composed of S. aureus SH1000 and P. aeruginosa PA01. Metal susceptibility tests suggested that biofilms displayed increased resistance over their planktonic state. Differential inhibitory effects were observed for different strains of planktonic and biofilm bacteria in response to different metals and their varying concentrations. Amongst the three metals tested, selenium proved to be the most active against all three species, whereas lithium demonstrated the least inhibitory effects. Scanning electron microscope (SEM) image analysis revealed several detrimental structural changes in bacterial cells exposed to metals compared to those grown in the metal-free culture. In conclusion, the results demonstrate the antibacterial efficacy of pure metals against planktonic and biofilm bacteria paving the way for further similar investigations in search of alternative antibacterial agents. Key words: Antibiotic resistance, antibacterial, metal, biofilm, planktonic." @default.
- W2318387825 created "2016-06-24" @default.
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- W2318387825 date "2014-03-05" @default.
- W2318387825 modified "2023-09-27" @default.
- W2318387825 title "Antibacterial effects of pure metals on clinically important bacteria growing in planktonic cultures and biofilms" @default.
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- W2318387825 doi "https://doi.org/10.5897/ajmr2013.5893" @default.
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