Evaluation of the synergistic effects of Lavandula angustifolia extract in combination with antibiotics against multidrug-resistant Enterococcus faecalis and its in-vitro antioxidant activity
DOI:
https://doi.org/10.48047/HM.V12.I1.2026.269-285Keywords:
Medicinal plant, Lavandula angustifolia extract, synergism, additive, MDRsAbstract
Lavandula angustifolia (lavender) is a perennial shrub known for its antibacterial and antioxidant properties, largely due to its essential oils and extracts. This study evaluated these properties using plant material collected in Lahore, Pakistan and processed at Minhaj University Lahore. The dried plant was extracted with 80% ethanol and chloroform and the crude extracts were tested against multidrug-resistant Enterococcus faecalis. Antibacterial activity was assessed via MIC and disk diffusion methods, while antioxidant activity was measured through hydrogen peroxide assay. The results showed significant antibacterial effects, particularly when combined with antibiotics, indicating synergistic interactions. The ethanolic extract achieved 73% inhibition while the chloroform extract showed 77.6% inhibition at a concentration of 5 mg/ml, with both also exhibiting strong antioxidant activity. These findings highlight Lavandula angustifolia as a promising source of bioactive compounds for the treatment of drug-resistant bacteria and the development of natural antioxidants.
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References
Akcay, S., Tunali, S. P., Gürbüz, T., & Dağdelen, N. (2023). DETERMINATION OF OPTIMAL DEFICIT IRRIGATION STRATEGIES FOR YIELD AND YIELD COMPONENTS OF LAVENDER (LAVANDULA ANGUSTIFOLIA MILL.) IN SEMI-
ARID CONDITIONS. Applied Ecology & Environmental Research, 21(6).
Azwanida, N. N. (2015). A review on the extraction methods use in medicinal plants, principle, strength and limitation. Med Aromat Plants, 4(196), 2167-0412.
Bellio, P., Fagnani, L., Nazzicone, L., & Celenza, G. (2021). New and simplified method for drug combination studies by checkerboard assay. MethodsX, 8, 101543.
Betlej, I., Andres, B., Cebulak, T., Kapusta, I., Balawejder, M., Żurek, N., ... & Borysiuk,
P. (2024). Phytochemical composition and antimicrobial properties of new Lavandula angustifolia ecotypes. Molecules, 29(8), 1740.
Carrasco, A., Tomas, V., Tudela, J., & Miguel, M. G. (2016). Comparative study of GC-MS characterization, antioxidant activity and hyaluronidase inhibition of different species of Lavandula and Thymus essential oils. Flavour and Fragrance Journal, 31(1), 57-69.
Despinasse, Y., Moja, S., Soler, C., Jullien, F., Pasquier, B., Bessière, J. M., ... & Nicolè, F. (2020). Structure of the chemical and genetic diversity of the true lavender over its natural range. Plants, 9(12), 1640.
Dobros, N., Zawada, K., & Paradowska, K. (2022). Phytochemical profile and antioxidant activity of Lavandula angustifolia and Lavandula x intermedia cultivars extracted with different methods. Antioxidants, 11(4), 711.
Fatsis-Kavalopoulos, N., Sánchez-Hevia, D. L., & Andersson, D. I. (2024). Beyond the FIC index: the extended information from fractional inhibitory concentrations (FICs). Journal of Antimicrobial Chemotherapy, 79(9), 2394-2396.
Kim, H. Y., Chang, R. Y. K., Morales, S., & Chan, H. K. (2021). Bacteriophage-delivering hydrogels: Current progress in combating antibiotic resistant bacterial infection. Antibiotics, 10(2), 130.
Kowalska-Krochmal, B., & Dudek-Wicher, R. (2021). The minimum inhibitory concentration of antibiotics: methods, interpretation, clinical relevance. Pathogens, 10(2), 165.
Lin, Y. T., Lin, H. H., Chen, C. H., Tseng, K. H., Ho, M. W., & Hsueh, P. R. (2026).
Interpretive agreement of susceptibility between broth microdilution and disk diffusion methods for cefiderocol, using criteria from the Clinical and Laboratory Standards Institute, European Committee on Antimicrobial Susceptibility Testing, and the Food and Drug Administration. Journal of Clinical Microbiology, 64(1), e01255-25.
Mahon, C. R., & Lehman, D. C. (2022). Textbook of diagnostic microbiology-E-Book: Textbook of diagnostic microbiology-E-Book. Elsevier Health Sciences.
Malakar, M. (2024). Lavandula spp.(Lavender): a herb more than just a relaxing scent. In Advances in Medicinal and Aromatic Plants (pp. vol1-315). Apple Academic Press.
Nwozo, O. S., Effiong, E. M., Aja, P. M., & Awuchi, C. G. (2023). Antioxidant, phytochemical, and therapeutic properties of medicinal plants: A review. International Journal of Food Properties, 26(1), 359-388.
Ozougwu, J. C. (2016). The role of reactive oxygen species and antioxidants in oxidative stress. Int. J. Res, 1(8), 1-8.
Radu, D., Râpeanu, G., Bahrim, G. E., & Stănciuc, N. (2019). Investigations on thermal degradation of phytochemicals from lavender extract. The Annals of the University Dunarea de Jos of Galati. Fascicle VI-Food Technology, 43(2), 33-47.
Sasaki, J. I., Yamanouchi, K., Nagaki, M., Arima, H., Aramachi, N., & Inaba, T. (2015). Antibacterial effect of lavender (Lavandula) flavor (volatile). Journal of Food Science and Engineering, 5, 95-102.
Tang, S., Shi, J., Liu, C., Zhang, F., Xiang, N., Liu, X., ... & Yang, G. (2017). Three new arylbenzofurans from Lavandula angustifolia and their bioactivities. Phytochemistry Letters, 19, 60-63.
Ugboko, H. U., Nwinyi, O. C., Oranusi, S. U., Fatoki, T. H., & Omonhinmin, C. A. (2020). Antimicrobial importance of medicinal plants in Nigeria. The Scientific World Journal, 2020
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Copyright (c) 2026 Rimsha Shafiq, Muhammad Daniyal Javed, Umair Akhtar, Areeba Naveed, Muhammad Haseeb Gohar, HafIz Khawar, Hafiza Nida Shehzadi, Saba Abbas (Author)

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