Effective inactivation of Candida albicans biofilms by using supercritical carbon dioxide

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• 作者：Hyong Seok Park ; Jungwoo Yang ; Hee Jung Choi…
• 关键词：Sterilization ; Supercritical carbon dioxide ; Candida albicans ; Biofilm
• 刊名：Bioprocess and Biosystems Engineering
• 出版年：2015
• 出版时间：September 2015
• 年：2015
• 卷：38
• 期：9
• 页码：1731-1737
• 全文大小：4,335 KB
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• 作者单位：Hyong Seok Park (1)
  Jungwoo Yang (2)
  Hee Jung Choi (3)
  Kyoung Heon Kim (1) (2)
  
  1. Department of Biotechnology, Graduate School, Korea University, Seoul, 136-713, Republic of Korea
  2. BK21 PLUS School of Life Science and Biotechnology, Korea University, Seoul, 136-713, Republic of Korea
  3. Division of Infectious Diseases, Department of Internal Medicine, Ewha Womans University School of Medicine, Seoul, 158-710, Republic of Korea
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Biotechnology
  Industrial Chemistry and Chemical Engineering
  Industrial and Production Engineering
  Waste Management and Waste Technology
  Waste Water Technology, Water Pollution Control, Water Management and Aquatic Pollution
  Food Science
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1615-7605

文摘

Present sterilization methods for biofilms in medical devices have limitations. Therefore, an alternative sterilization method using supercritical carbon dioxide (SC-CO2) was tested on Candida albicans biofilms. The effect of varying pressure, temperature, and treatment time on the inactivation of C. albicans spores in suspensions and in biofilms was examined. The parameters such as treatment time, pressure, and temperature that led to the complete inactivation of C. albicans biofilms ranged 5-0?min, 100-00?bar, and 35-5?°C, respectively. Notably, treatment of SC-CO2 at either 100?bar and 40?°C or 200?bar and 30?°C induced complete inactivation of spores within 5?min. Furthermore, it was found that wet biofilms (0.4?%, w/w) had higher sensitivity to SC-CO2 than dried biofilms. Finally, spore inactivation was confirmed by confocal laser scanning microscopy. In this study, the use of a low-temperature SC-CO2 sterilization method was proven to be effective in fungal biofilm inactivation, and the moisture content of biofilms was revealed to be the key factor for biofilm inactivation.