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Characterization and antimicrobial activity of a pharmaceutical microemulsion.

Abstract：

:The characterization of a pharmaceutical microemulsion system with glycerol monolaurate as oil, ethanol as cosurfactant, Tween 40 as surfactant, sodium diacetate and water, and the antimicrobial activities against Escherichia coli, Staphylococcus aureus, Bacillus subtilis, Candida albicans, Aspergillus niger and Penicillium expansum have been studied. The influence of ethanol and sodium diacetate on oil solubilization capability was clearly reflected in the phase behavior of these systems. One microemulsion formulation was obtained and remained stable by physical stability studies. The antimicrobial assay using solid medium diffusion method showed that the prepared microemulsion was comparable to the commonly used antimicrobials as positive controls. The kinetics of killing experiments demonstrated that the microemulsion caused a complete loss of viability of bacterial cells (E. coli, S. aureus and B. subtilis) in 1 min, killed over 99% A. niger and P. expansum spores and 99.9% C. albicans cells rapidly within 2 min and resulted in a complete loss of fungal viability in 5 min. The fast killing kinetics of the microemulsion was in good agreement with the transmission electron microscopy observations, indicating the antimembrane activity of the microemulsion on bacterial and fungal cells due to the disruption and dysfunction of biological membranes and cell walls.

journal_name

Int J Pharm

journal_title

International journal of pharmaceutics

authors

Zhang H,Cui Y,Zhu S,Feng F,Zheng X

doi

10.1016/j.ijpharm.2010.05.022

subject

Has Abstract

pub_date

2010-08-16 00:00:00

pages

154-60

issue

1-2

eissn

0378-5173

issn

1873-3476

pii

S0378-5173(10)00383-2

journal_volume

395

pub_type

杂志文章

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