Turmeric Rhizome Ethanol Extract Exhibits Antibacterial Activity Against E. coli

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Turmeric, a plant with antibacterial properties due to its curcumin content, has been found to inhibit E. coli growth in a study conducted by researchers at Universitas Jember. The investigation examined the effect of various factors on the antibacterial activity of turmeric rhizome ethanol extract, including the type of ethanol solvent, antibacterial test methods, and bacterial inoculation techniques. The findings suggest that the type of ethanol solvent, antibacterial test method, and inoculation technique significantly influence the antibacterial activity of the extract.

Key Takeaways:

  • The ethanol extract of turmeric rhizomes was capable of inhibiting E. coli growth under various treatment conditions, with the highest average inhibition zone observed in the PA_C_SP treatment (29.82 mm).
  • The type of ethanol solvent that produced a larger average inhibition zone was 99% ethanol.
  • The disk diffusion antibacterial test method produced a larger average zone of inhibition than the well diffusion method.
  • The average inhibition zone results for the spread plate inoculation technique were greater than for the pour plate inoculation technique.
  • Further research is needed to investigate the effect of the type of ethanol solvent, antibacterial test methods, and bacterial inoculation techniques on the antibacterial activity of turmeric rhizome extract against other types of pathogenic bacteria.
  • The research was conducted by Endang Soesetyaningsih and co-authors from Universitas Jember.

Statistics:

  • 29.82 mm: The highest average inhibition zone observed in the PA_C_SP treatment.
  • 2.12 mm: The lowest average inhibition zone observed in the T_S_PP treatment.
  • 99%: The type of ethanol solvent that produced a larger average inhibition zone.
  • 96%: The alternative type of ethanol solvent used in the study.
  • 80%: The final concentration of the turmeric rhizome ethanol extract.
  • 13(3): The volume and issue number of the journal where the research was published.

Sources:

  • Berkala Sainstek, 2025, 13(3): 160-170.
  • https://doi-org.sdpl.idm.oclc.org/10.19184/bst.v13i3.46865
  • Universitas Jember.
  • Endang Soesetyaningsih.