International Journal of Oral Biology

The Korean Academy of Oral Biology (대한구강생물학회)
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Postantibiotic Effects and Postantibiotic Sub-MIC Effects of Antibiotics on Treponema Denticola

  • Lee, Si-Young (Department of Oral Microbiology, College of Dentistry, Research Institute of Oral Science, Gangneung-Wonju National University)
  • Published : 2009.09.30
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Abstract

Postantibiotic effect (PAE) is defined as the length of time that bacterial growth is suppressed following brief exposure to an antibiotic. In this study, the in vitro PAE, postantibiotic sub-MIC effect (PA SME) and sub-MIC effect (SME) of antibiotics on Treponema denticola ATCC 35405 were investigated. The PAE of doxycycline and metronidazole were 20.3 h and 25.0 h, respectively. The PA SMEs examined by addition of 0.1, 0.2 and 0.3X MICs during the postantibiotic phase of the bacteria for metronidazole were longer than those for doxycycline. In contrast, the SMEs for doxycycline were longer than those for metronidazole. The PA-SME and SME values increased as the concentration of antibiotics increased. The present study illustrates the existence of PAE, PA-SME and SME for several antibiotics against T. denticola, thereby extending the pharmacodynamic advantages of these antibiotics.

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References

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