Cited by 218Essential Oils and Antimicrobial ActivityAntimicrobial agents and applicationsProbiotics and Fermented Foods

Activity of natural antimicrobial compounds against Escherichia coli and Salmonella enterica serovar Typhimurium

Olasupo, N.A., Fitzgerald, D.J., Gasson, M.J., Narbad, A.·2003·Letters in Applied Microbiology

Abstract

AIMS: The objective of this study was to evaluate the inhibitory activity of several natural organic compounds alone or in combination with nisin against Escherichia coli and Salmonella Typhimurium. METHODS AND RESULTS: The minimum inhibitory concentration (MIC) of five natural organic compounds were determined, and the effect of their combinations with nisin was evaluated by the checkerboard assay using the Bioscreen C. As expected, nisin by itself showed no inhibition against either of the Gram-negative bacteria. Thymol was found to be the most effective with the lowest MIC values of 1.0 and 1.2 mmol 1-1 against Salm. Typhimurium and E. coli, respectively. After thymol, the antimicrobial order of the natural organic compounds was carvacrol > eugenol > cinnamic acid > diacetyl. However, the combination of nisin with the natural organic compounds did not result in the enhancement of their antimicrobial activities. On the contrary, combination of nisin with diacetyl against Salm. Typhimurium resulted in an antagonism of diacetyl activity. CONCLUSIONS: While the individual natural organic compounds showed inhibitory activity against the two Gram-negatives, their combinations with nisin showed no improvement of antimicrobial activity. SIGNIFICANCE AND IMPACT OF THE STUDY: This study shows the potential of the natural organic compounds to control E. coli and Salm. Typhimurium.

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Crossref · 10.1046/j.1472-765x.2003.01427.x

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Authors
Olasupo, N. A., Fitzgerald, D. J., Gasson, M. J., & Narbad, A.
Affiliations
  • Lagos State University (NG)
  • Norwich Research Park (GB)
Corresponding author
Narbad, A.
Venue
Letters in Applied Microbiology
Published
2003-12
Volume
37
Issue
6
Pages
448-451
ISSN
  • 0266-8254 (ISSN-L)
  • 1365-2673
OpenAlex
W1970033253
Cited by
218
References
22
Citations by year
2026: 2 · 2025: 5 · 2024: 4 · 2023: 7 · 2022: 11 · 2021: 19 · 2020: 11 · 2019: 12 · 2018: 16 · 2017: 13 · 2016: 8 · 2015: 9 · 2014: 10 · 2013: 12 · 2012: 12
FWCI
4.35
Type
journal article
Language
en
Open access
closed
Locations
  • Letters in Applied Microbiology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Agricultural and Biological Sciences › Food Science › Essential Oils and Antimicrobial Activity
  • Physical Sciences › Chemistry › Organic Chemistry › Antimicrobial agents and applications
  • Life Sciences › Agricultural and Biological Sciences › Food Science › Probiotics and Fermented Foods
Keywords
natural antimicrobials, Escherichia coli, Salmonella typhimurium, nisin, thymol, carvacrol, eugenol, cinnamic acid, diacetyl, minimum inhibitory concentration, synergistic and antagonistic effects, Gram-negative bacteria, food safety
MeSH terms
Cymenes, Anti-Bacterial Agents, Cinnamates, Diacetyl, Drug Therapy, Combination, Escherichia coli, Eugenol, Microbial Sensitivity Tests, Nisin, Salmonella typhimurium, Thymol, Monoterpenes, In Vitro Techniques

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