Antimicrobial activity of oregan and clove essential oils against some foodborne pathogens

Authors

DOI:

https://doi.org/10.5433/1679-0367.2020v41n1p3

Keywords:

Disk-diffusion method, Minimal inhibitory concentrations, Natural antimicrobials.

Abstract

The tendency to replace synthetic antimicrobials for natural ones in food industry and an increase in bacterial resistance to antibiotics resulted in a necessity to find new alternatives, and essential oils are emerging as promising substitutes for synthetic chemicals in food preservation. The objective of this work was to test the antimicrobial activity of oregano (OEO) and clove (CEO) essential oils over a range of bacteria, molds and yeast of importance as pathogens or food spoilage. The antimicrobial activity of oregano and clove essential oils were analyzed by disk diffusion method and broth microdilution test (MIC) of OEO and CEO were determined for each tested microorganism. OEO and CEO were evaluated in natura (IN) and after thermal processing (TP) at 120 o C for 5 min. Both OEO and CEO presented the same inhibition zones for IN and TP samples, for all tested microorganisms, indicating that these oils can be thermally processed maintaining their antimicrobial activity. For OEO and CEO, the more sensitive microorganisms were the fungi (Aspergillus niger, Penicillium citrinum and Candida albicans), followed by Staphylococcus aureus, Bacillus cereus and Methicillin - resistant Staphylococcus aureus (MRSA); the lowest antimicrobial activities were observed against Streptococcus mutans and Enterococcus faecalis. In general, OEO resulted in higher inhibition zones and lower MIC values for all tested microorganisms, suggesting that it was more effective as an antimicrobial agent than CEO

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Author Biographies

Flavia Debiagi, Universidade Estadual de Londrina

PhD in Biotechnology, State University of Londrina, Londrina, Paraná, Brazil. Professor in the Department of Biochemistry
and Biotechnology, Universidade Estadual de Londrina, Londrina, Paraná, Brazil.

Renata K.T. Kobayashi, Universidade Estadual de Londrina

PhD in Microbiology, State University of Londrina, Londrina, Paraná, Brazil. Professor in the Department of Microbiology,
Universidade Estadual de Londrina, Londrina, Paraná, Brazil.

Gerson Nakazato, Universidade Estadual de Londrina

PhD in Genetics and Molecular Biology, State University of Campinas, Campinas, São Paulo, Brazil. Professor in the
Department of Microbiology, Universidade Estadual de Londrina, Londrina, Paraná, Brazil.

Luciano Aparecido Panagio, Universidade Estadual de Londrina

PhD in Basic and Applied Immunology, University of São Paulo, Ribeirão Preto, São Paulo, Brazil. Professor in the Department
of Microbiology, Universidade Estadual de Londrina, Londrina, Paraná, Brazil.

Suzana Mali, Universidade Estadual de Londrina

PhD in Food Sciences, University of Londrina, Londrina, Paraná, Brazil. Professor in the Department of Biochemistry and
Biotechnology, Universidade Estadual de Londrina, Londrina, Paraná, Brazil.

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Published

2020-05-06

How to Cite

1.
Debiagi F, Kobayashi RK, Nakazato G, Panagio LA, Mali S. Antimicrobial activity of oregan and clove essential oils against some foodborne pathogens. Semin. Cienc. Biol. Saude [Internet]. 2020 May 6 [cited 2024 Nov. 21];41(1):3-12. Available from: https://ojs.uel.br/revistas/uel/index.php/seminabio/article/view/36653

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