Sonodynamic action of curcumin on foodborne bacteria Bacillus cereus and Escherichia coli
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摘要Bacterial contamination is an important cause of foodborne diseases. The present study aimed to investigate sonodynamic action of curcumin on foodborne bacteria Bacillus cereus (B. cereus) and Escherichia coli (E. coli). The uptake of curcumin was measured for optimizing the concentration incubation time before ultrasound sonication, and colony forming units (CFU) were counted after ultrasound treatment. The chromosomal DNA fragmentation of bacteria was analyzed and the effect of hypoxic condition on the antibacterial efficacy of sonodynamic action of curcumin was also assessed in this study. The results showed that the maximum uptake of curcumin in B. cereus and E. coli occurred in 50 min after curcumin incubation. Curcumin had sonodynamic bactericidal activity in a curcumin dose-dependent manner, and 5.6-log reduction in CFU of B. cereus was observed after curcumin treatment (2.0 mu M), however, only 2-log reduction in CFU of E. coli after 40 mu M curcumin treatment. No significant change in chromosomal DNA was found after the combined treatment of curcumin and ultrasound. The survival of B. cereus and E. coli after sonodynamic treatment in hypoxic group was significantly higher than that in normal oxygen group. These findings indicated that sonodynamic action of curcumin had significant inactivation effect on foodborne bacteria, and B. cereus was more sensitive to sonodynamic treatment of curcumin than E. coli. Sonodynamic antibacterial activity of curcumin might be dependent on the oxygen environment. (C) 2015 Elsevier B.V. All rights reserved.
著者Wang XN, Ip M, Leung AW, Yang ZR, Wang P, Zhang BT, Ip SP, Xu CS
會議名稱2015 International Congress on Ultrasonics (ICU)
會議開始日11.05.2015
會議完結日14.05.2015
會議地點Metz
期刊名稱Ultrasonics,Ultrasonics
出版年份2015
月份9
日期1
卷號62
出版社ELSEVIER SCIENCE BV
頁次75 - 79
國際標準期刊號0041-624X
電子國際標準期刊號1874-9968
語言英式英語
關鍵詞Curcumin; Foodborne bacteria; Sonodynamic antibacterial chemotherapy; Sonodynamic inactivation
Web of Science 學科類別Acoustics; Radiology, Nuclear Medicine & Medical Imaging

上次更新時間 2020-15-09 於 03:34