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      1. Author :
        van Staden, A. D.; Brand, A. M.; Dicks, L. M.
      2. Title :
      3. Type :
        Journal Article
      4. Year :
        2012
      5. Publication :
        J Appl Microbiol
      6. Products :
      7. Volume :
        N/A
      8. Issue :
        N/A
      9. Page Numbers :
        N/A
      10. Research Area :
        N/A
      11. Keywords :
        Xen36, Xen 36, Staphylococcus aureus Xen36, IVIS
      12. Abstract :
        Aims: To determine if nisin F-loaded self-setting brushite cement could control the growth of Staphylococcus aureus in vivo. Methods and Results: Brushite cement was prepared by mixing equimolar concentrations of beta-tricalcium phosphate and monocalcium phosphate monohydrate. Nisin F was added at 5.0%, 2.5% and 1.0% (w/w) and the cement moulded into cylinders. In vitro antibacterial activity was determined using a delayed agar diffusion assay. Release of nisin F from the cement was determined using BCA protein assays. Based on scanning electron microscopy and X-ray diffraction analysis, nisin F did not cause significant changes in cement structure or chemistry. Cement containing 5.0% (w/w) nisin F yielded the most promising in vitro results. Nisin F-loaded cement was implanted into a subcutaneous pocket on the back of mice and then infected with S. aureus Xen 36. Infection was monitored for 7 days, using an in vivo imaging system. Nisin F prevented S. aureus infection for 7 days and no viable cells were isolated from the implants. Conclusions: Nisin F-loaded brushite cement successfully prevented in vivo growth of S. aureus. Significance and Impact of the Study: Nisin F incorporated into bone cement may be used to control S. aureus infection in vivo. (c) 2012The Authors Journal of Applied Microbiology (c) 2012 The Society for Applied Microbiology.
      13. URL :
        http://www.ncbi.nlm.nih.gov/pubmed/22268790
      14. Call Number :
        PKI @ kd.modi @ 11
      15. Serial :
        10402
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