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Five essential oils from aromatic plants of Cameroon: their antibacterial activity and ability to permeabilize the cytoplasmic membrane of Listeria innocua examined by flow cytometry.
Lett Appl Microbiol. 2004; 39(5):395-400.LA

Abstract

AIMS

To investigate the antibacterial effect of five essential oils (EO) extracted from aromatic plants (Cymbopogon citratus, Ocimumbasilicum, Ocimum gratissimum, Thymus vulgaris and Zingiber officinale) of Cameroon against strains of Listeria monocytogenes, L. innocua and Staphylococcus aureus. The ability of selected EO to permeabilize the cytoplasmic membrane of L. innocua was also examined.

METHODS AND RESULTS

The antibacterial activity of the EO determined by the agar diffusion method showed that T. vulgaris had the highest activity followed by O. gratissimum and C. citratus. Lowest activity was recorded from Z. officinale and O. basilicum. Significant differences in sensitivity between strains of Listeria and S. aureus were observed. Flow cytometry of L. innocua stained with carboxy-fluorescein diacetate showed that the fluorescence intensity of cells exposed to EO decreased faster than nonexposed cells, indicating that EO permeabilized the cytoplasmic membrane with the leakage of carboxy-fluorescein.

CONCLUSIONS

Almost all the EO tested showed antibacterial activity to a different extent. The antibacterial effect was due to permeabilization of the cytoplasmic membrane.

SIGNIFICANCE AND IMPACT OF THE STUDY

This study has identified the preservative potential of the EO examined. The use of sensitive method, such as flow cytometry, is advantageous for quick generation of data on the antibacterial effect of EO.

Authors+Show Affiliations

Department of Biochemistry, University of Yaounde-I, Box 812, Yaounde, Cameroon. jnguefack2001@yahoo.co.ukNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

15482428

Citation

Nguefack, J, et al. "Five Essential Oils From Aromatic Plants of Cameroon: Their Antibacterial Activity and Ability to Permeabilize the Cytoplasmic Membrane of Listeria Innocua Examined By Flow Cytometry." Letters in Applied Microbiology, vol. 39, no. 5, 2004, pp. 395-400.
Nguefack J, Budde BB, Jakobsen M. Five essential oils from aromatic plants of Cameroon: their antibacterial activity and ability to permeabilize the cytoplasmic membrane of Listeria innocua examined by flow cytometry. Lett Appl Microbiol. 2004;39(5):395-400.
Nguefack, J., Budde, B. B., & Jakobsen, M. (2004). Five essential oils from aromatic plants of Cameroon: their antibacterial activity and ability to permeabilize the cytoplasmic membrane of Listeria innocua examined by flow cytometry. Letters in Applied Microbiology, 39(5), 395-400.
Nguefack J, Budde BB, Jakobsen M. Five Essential Oils From Aromatic Plants of Cameroon: Their Antibacterial Activity and Ability to Permeabilize the Cytoplasmic Membrane of Listeria Innocua Examined By Flow Cytometry. Lett Appl Microbiol. 2004;39(5):395-400. PubMed PMID: 15482428.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Five essential oils from aromatic plants of Cameroon: their antibacterial activity and ability to permeabilize the cytoplasmic membrane of Listeria innocua examined by flow cytometry. AU - Nguefack,J, AU - Budde,B B, AU - Jakobsen,M, PY - 2004/10/16/pubmed PY - 2005/2/18/medline PY - 2004/10/16/entrez SP - 395 EP - 400 JF - Letters in applied microbiology JO - Lett Appl Microbiol VL - 39 IS - 5 N2 - AIMS: To investigate the antibacterial effect of five essential oils (EO) extracted from aromatic plants (Cymbopogon citratus, Ocimumbasilicum, Ocimum gratissimum, Thymus vulgaris and Zingiber officinale) of Cameroon against strains of Listeria monocytogenes, L. innocua and Staphylococcus aureus. The ability of selected EO to permeabilize the cytoplasmic membrane of L. innocua was also examined. METHODS AND RESULTS: The antibacterial activity of the EO determined by the agar diffusion method showed that T. vulgaris had the highest activity followed by O. gratissimum and C. citratus. Lowest activity was recorded from Z. officinale and O. basilicum. Significant differences in sensitivity between strains of Listeria and S. aureus were observed. Flow cytometry of L. innocua stained with carboxy-fluorescein diacetate showed that the fluorescence intensity of cells exposed to EO decreased faster than nonexposed cells, indicating that EO permeabilized the cytoplasmic membrane with the leakage of carboxy-fluorescein. CONCLUSIONS: Almost all the EO tested showed antibacterial activity to a different extent. The antibacterial effect was due to permeabilization of the cytoplasmic membrane. SIGNIFICANCE AND IMPACT OF THE STUDY: This study has identified the preservative potential of the EO examined. The use of sensitive method, such as flow cytometry, is advantageous for quick generation of data on the antibacterial effect of EO. SN - 0266-8254 UR - https://www.unboundmedicine.com/medline/citation/15482428/Five_essential_oils_from_aromatic_plants_of_Cameroon:_their_antibacterial_activity_and_ability_to_permeabilize_the_cytoplasmic_membrane_of_Listeria_innocua_examined_by_flow_cytometry_ L2 - https://onlinelibrary.wiley.com/resolve/openurl?genre=article&sid=nlm:pubmed&issn=0266-8254&date=2004&volume=39&issue=5&spage=395 DB - PRIME DP - Unbound Medicine ER -