ZHU Xiao-ming, YANG Jia-qin, ZHANG Chang-feng, et al. The Effects of Huanglian Jiedu Decoction against Biofilms and its Synergism with Azithromycin on Planktonic [J]. Chinese journal of experimental traditional medical formulae, 2012, 18(11): 155-158.
ZHU Xiao-ming, YANG Jia-qin, ZHANG Chang-feng, et al. The Effects of Huanglian Jiedu Decoction against Biofilms and its Synergism with Azithromycin on Planktonic [J]. Chinese journal of experimental traditional medical formulae, 2012, 18(11): 155-158.DOI:
Objective: To investigate the effects of Huanglian Jiedu decoction against Pseudomonas aeruginosa biofilms and its synergistic antibacterial in combination with azithromycin. Method: The microdilution assay was used to detect MIC of Huanglian Jiedu decoction against P. aeruginosa
checkerboard method was used to examine synersism of Huanglian Jiedu decoction and azithromycin. MTT assay was used to detect SMIC of Huanglian Jiedu decoction against P. aeruginosa biofilms
and microscopes was used to observe morphology of biofilms treated with the two drugs. Result: MIC of Huanglian Jiedu decoction against P. aeruginosa was 100 g·L-1and azithromycin 200 mg·L-1. After the combination of two-drug MIC was 25 g·L-1 and 25 mg·L-1fractional inhibitory conceritration(FIC) 0.1875
which showed a synergismwith azithromycin.SMIC50 of Huanglian Jiedu Decoction against P. aeruginosa biofilms at 1
3
7 d was 15.6
15.6
31.25 g·L-1
respectively; SMIC80 of the biofilms was 250
250
250 g·L-1
respectively. Morphologically Huanglian Jiedu decoction inhibited P. aeruginosa biofilms evidently at the concentration of SMIC80. Conclusion: Huanglian Jiedu decoction could inhibit P. aeruginosa biofilms