Post-antibacterial effect of thymol

Pharmaceutical Biology
Gholamreza ZarriniAhmad Reza Shahverdi

Abstract

The antibacterial activity of thymol has been well established and reported in the scientific literature. Continued suppression of bacterial growth following limited exposure to antimicrobial compounds at different concentrations greater than or equal to the minimum inhibitory concentration level (MIC) and at concentrations less than the MIC can be used as an indicator of biological activity, and are respectively referred to as a post-antibacterial effect (PAE) and a post-antibiotic sub-MIC effect (PA-SME). In this study, the PAE and the PA-SME of thymol against Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa, and Bacillus cereus were investigated. A spectrophotometric method was used to determine the PAE and the PA-SME of thymol against the selected test strains. Thymol exhibited a considerable PAE and PA-SME at MIC and sub-MIC concentrations against test strains. The greatest duration of both the PAE and the PA-SME was observed for thymol against E. coli and P. aeruginosa. The PAE and PA-SME times for E. coli were 12 and 8 h, respectively, and for P. aeruginosa were 11 and 7.5 h, respectively. The duration of the PAE and PA-SME observed for S. aureus and B. cereus was shorter than for Gram-negative strains.

References

Jun 1, 1993·The Journal of Antimicrobial Chemotherapy·I Odenholt-Tornqvist
May 2, 2003·Phytotherapy Research : PTR·Russel S RamsewakLouise Selanders
Oct 2, 2003·The Journal of Antimicrobial Chemotherapy·Michael R JacobsPeter C Appelbaum
Jul 13, 2004·International Journal of Food Microbiology·Sara Burt
May 27, 2005·Antimicrobial Agents and Chemotherapy·Domenico TrombettaGiuseppe Bisignano

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Citations

Sep 29, 2012·Journal of Medical Microbiology·Sean ConnellRiyi Shi
Mar 1, 2016·Artificial Cells, Nanomedicine, and Biotechnology·Fatemeh AsghariSoodabeh Davaran
Jun 23, 2011·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Ramzi A MothanaNawal M Al-Musayeib
Jun 16, 2011·Chemistry & Biodiversity·Goutam BrahmachariArindam Gangopadhyay
Jul 25, 2018·Applied Biochemistry and Biotechnology·Daljit Singh Arora, Navdeep Kaur
Jul 2, 2020·Langmuir : the ACS Journal of Surfaces and Colloids·Pradyumn SharmaJaydeep Kumar Basu

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