Acta Veterinaria et Zootechnica Sinica ›› 2025, Vol. 56 ›› Issue (11): 5925-5935.doi: 10.11843/j.issn.0366-6964.2025.11.047

• Clinical Veterinary Medicine • Previous Articles     Next Articles

Analysis of Antibacterial Activity and Synergistic Effect of Natural Plant Essential Oils Combined with Potassium Monopersulfate

SHEN Haoyi(), ZHAO Yiran(), SHI Jingwen, LEI Binrong, QIAN Ruolin, YUAN Hong, REN Ge, YAO Hua, ZHANG Hua*()   

  1. College of Veterinary Medicine, Beijing University of Agriculture, Beijing 102206, China
  • Received:2024-11-28 Online:2025-11-23 Published:2025-11-27
  • Contact: ZHANG Hua E-mail:13621277161@139.com;zhaoyiran0917@icloud.com;huazhang0914@163.com

Abstract:

The aim of this study was to investigate the antibacterial activity of natural plant essential oils and the synergistic effect combined with potassium monopersulfate. The minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) of eight essential oils and potassium monopersulfate against Staphylococcus aureus ATCC 29740 and Escherichia coli CVCC 1450 were detected by the micro broth dilution method. In vitro inhibitory activities were detected by using the disc diffusion method. The dynamic inhibitory effects of different essential oil concentrations on bacterial growth were analyzed by time-inhibition curves.The synergistic antimicrobial effects of essential oils and potassium monopersulfate were investigated using the checkerboard method combined with the FIC index.The results indicated that the essential oils of domestic lavender and Australian lavender exhibited the lowest MIC (1.95 μg·mL-1) against Staphylococcus aureus, while the essential oils of domestic chamomile and domestic lavender demonstrated the lowest MIC (15.63 μg·mL-1) against Escherichia coli. The evaluation of the joint antibacterial effect indicated that the essential oil of domestic chamomile, in combination with the potassium monopersulfate, exhibited a synergistic antibacterial effect, with an FIC index of 0.5. In this study, the four highly bacteriostatic plant essential oils under examination exhibited promising inhibitory activity against animal pathogens. Potassium monopersulfate's combination effectively reduced the MIC of Staphylococcus aureus ATCC 29740 and Escherichia coli CVCC 1450, and the combination of domestic chamomile essential oil and potassium monopersulfate exhibited a synergistic effect. These findings provide a valuable reference for the development of natural and safe disinfectant preparations.

Key words: essential oil, potassium monopersulfate, minimum inhibitory concentration, fractional inhibitory concentration index, co-medication

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