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- W2948372783 abstract "Introduction: Quorum sensing controls a wide spectrum of processes and phenotypic behaviours including biofilm formation that helps in the survival and virulence of bacteria in hosts. Thus, anti-quorum sensing is suggested to combat bacterial infections. This study aimed to evaluate the anti-biofilm forming and anti-quorum sensing activities which may contribute to the anti-bacterial effect of ethanol and aqueous extracts of Orthosiphon stamineus and Andrographis paniculata leaves and stems. Materials and method: General biofilm assay protocol with modification was used for the biofilm assay to test the effect of different concentration (2 mg/ml and 3 mg/ml) of extracts on the biofilm formation by Pseudomonas aeruginosa. Optical density of crystal violet/acetic acid solution was measured at 595 nm and the percentage of biofilm inhibition was calculated. In quorum quenching assay, visualization of reporter strain AI1-QQ.1 growth will be used for the detection of bio-molecules interfering with acyl homoserine lactone (AHL). Results: Extracts with the highest ability to inhibit biofilm formation were ethanol extract of O.stamineus stem and A.paniculata leaves with 77.84% at extracts concentration of 3 mg/ml. Aqueous extract of O.stamineus leaves showed the least potential with 13.41% inhibition. However, aqueous extract of A.paniculata showed zero inhibition at 3 mg/ml and two extracts (aqueous extract of O.stamineus and A.paniculata leaves) gave negative value at concentration of 3 mg/ml and 2 mg/ml, respectively. Quorum quenching assay has yet to be done. Conclusion: It could be concluded that most of the extracts possess anti-biofilm property." @default.
- W2948372783 created "2019-06-14" @default.
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- W2948372783 date "2017-09-15" @default.
- W2948372783 modified "2023-09-26" @default.
- W2948372783 title "Anti-Biofilm and Anti-Quorum Sensing Properties of Ethanol and Aqueous Extracts of Orthosiphon Stamineus and Andrographis Paniculata Leaves and Stems" @default.
- W2948372783 doi "https://doi.org/10.31436/imjm.v16i1.1129" @default.
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