Abstract
Planktonic and young biofilm cells were completely eradicated after exposure of these cells to drug levels representing one loading and two maintenance doses of tobramycin and cephalexin. A very different picture was observed when antibiotic exposure was initiated on day 21. Complete eradication of the old biofilm cells was not observed even when the antibiotic exposure was continued for an extra 6 days. Regrowth of the organism was observed when the antibiotic exposure was terminated.
Full text
PDF



Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- Anwar H., Costerton J. W. Enhanced activity of combination of tobramycin and piperacillin for eradication of sessile biofilm cells of Pseudomonas aeruginosa. Antimicrob Agents Chemother. 1990 Sep;34(9):1666–1671. doi: 10.1128/aac.34.9.1666. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Anwar H., Dasgupta M. K., Costerton J. W. Testing the susceptibility of bacteria in biofilms to antibacterial agents. Antimicrob Agents Chemother. 1990 Nov;34(11):2043–2046. doi: 10.1128/aac.34.11.2043. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Anwar H., Dasgupta M., Lam K., Costerton J. W. Tobramycin resistance of mucoid Pseudomonas aeruginosa biofilm grown under iron limitation. J Antimicrob Chemother. 1989 Nov;24(5):647–655. doi: 10.1093/jac/24.5.647. [DOI] [PubMed] [Google Scholar]
- Anwar H., van Biesen T., Dasgupta M., Lam K., Costerton J. W. Interaction of biofilm bacteria with antibiotics in a novel in vitro chemostat system. Antimicrob Agents Chemother. 1989 Oct;33(10):1824–1826. doi: 10.1128/aac.33.10.1824. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Costerton J. W., Cheng K. J., Geesey G. G., Ladd T. I., Nickel J. C., Dasgupta M., Marrie T. J. Bacterial biofilms in nature and disease. Annu Rev Microbiol. 1987;41:435–464. doi: 10.1146/annurev.mi.41.100187.002251. [DOI] [PubMed] [Google Scholar]
- Dickinson G. M., Bisno A. L. Infections associated with indwelling devices: concepts of pathogenesis; infections associated with intravascular devices. Antimicrob Agents Chemother. 1989 May;33(5):597–601. doi: 10.1128/aac.33.5.597. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Dickinson G. M., Bisno A. L. Infections associated with indwelling devices: infections related to extravascular devices. Antimicrob Agents Chemother. 1989 May;33(5):602–607. doi: 10.1128/aac.33.5.602. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Giwercman B., Jensen E. T., Høiby N., Kharazmi A., Costerton J. W. Induction of beta-lactamase production in Pseudomonas aeruginosa biofilm. Antimicrob Agents Chemother. 1991 May;35(5):1008–1010. doi: 10.1128/aac.35.5.1008. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Kadurugamuwa J. L., Anwar H., Brown M. R., Shand G. H., Ward K. H. Media for study of growth kinetics and envelope properties of iron-deprived bacteria. J Clin Microbiol. 1987 May;25(5):849–855. doi: 10.1128/jcm.25.5.849-855.1987. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Kunin C. M., Steele C. Culture of the surfaces of urinary catheters to sample urethral flora and study the effect of antimicrobial therapy. J Clin Microbiol. 1985 Jun;21(6):902–908. doi: 10.1128/jcm.21.6.902-908.1985. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Marrie T. J., Costerton J. W. Scanning and transmission electron microscopy of in situ bacterial colonization of intravenous and intraarterial catheters. J Clin Microbiol. 1984 May;19(5):687–693. doi: 10.1128/jcm.19.5.687-693.1984. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Marrie T. J., Nelligan J., Costerton J. W. A scanning and transmission electron microscopic study of an infected endocardial pacemaker lead. Circulation. 1982 Dec;66(6):1339–1341. doi: 10.1161/01.cir.66.6.1339. [DOI] [PubMed] [Google Scholar]
- Nickel J. C., Gristina A. G., Costerton J. W. Electron microscopic study of an infected Foley catheter. Can J Surg. 1985 Jan;28(1):50-1, 54. [PubMed] [Google Scholar]
- Nickel J. C., Ruseska I., Wright J. B., Costerton J. W. Tobramycin resistance of Pseudomonas aeruginosa cells growing as a biofilm on urinary catheter material. Antimicrob Agents Chemother. 1985 Apr;27(4):619–624. doi: 10.1128/aac.27.4.619. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Prosser B. L., Taylor D., Dix B. A., Cleeland R. Method of evaluating effects of antibiotics on bacterial biofilm. Antimicrob Agents Chemother. 1987 Oct;31(10):1502–1506. doi: 10.1128/aac.31.10.1502. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Vas S. I. Microbiologic aspects of chronic ambulatory peritoneal dialysis. Kidney Int. 1983 Jan;23(1):83–92. doi: 10.1038/ki.1983.15. [DOI] [PubMed] [Google Scholar]
- van der Hoeven J. S., van den Kieboom C. W. Effects of propicillin on mixed continuous cultures of periodontal bacteria. Antimicrob Agents Chemother. 1991 Sep;35(9):1717–1720. doi: 10.1128/aac.35.9.1717. [DOI] [PMC free article] [PubMed] [Google Scholar]