Antimicrobial Activity of Oils and Extracts of

Cymbopogon citratus (Lemon Grass),

Eucalyptus citriodora and Eucalyptus camaldulensis

Akin-Osanaiye, B. C.; Agbaji, A. S.; Dakare, Monday A.

doi:10.3923/jms.2007.694.697

Cited by 24 publications

(13 citation statements)

References 2 publications

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“…Our findings were agreement with the findings of the previous study for S. aureus [29]. One the other hand, they were disagreement with the observations for E. coli [30]. Furthermore, the antimicrobial activity of highly polar ethanol extracts of C. frutescens pepper was already reported against a number of microorganisms [31,32].…”

Section: Antimicrobial Activitysupporting

confidence: 72%

Chemical composition, antioxidant and antimicrobial activities of Capsicum annuum var. annuum concentrated extract obtained by reverse osmosis

Casimir¹,

Martin²,

Philippe³

et al. 2018

GSC Biol. and Pharm. Sci.

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The purpose of this study was to assess Chemical composition, total flavonoid and carotenoid contents with antioxidant and antimicrobial activities in crude and concentrated extracts of pepper fruit (Capsicum annuum var an.). The concentrated extract was obtained by reverse osmosis process. Radical scavenging potential was also determined using in vitro assay: 1, 1-diphenyl-2-picrylhydrazyl (DPPH) radicals. The GC-MS analysis of concentrated extracts of C. annuum revealed the presence of major constituents such as lactic acid, valeric acid, 5-methoxy, butanedioic acid, phenylalanine, hexadecanoic acid, ethyl ester, 6-methoxy-hexane-2-ol, butane, 2,3diol, pentanoicacid,4-oxo-, 3-methyl-2-hydroxyl butanoic acid, benzeneacetic acid, 4-hydroxyl, 1,2-benzenedicarboxylic acid ester, 2,5-furandicarboxylic acid, 7-hydroxyl7-methyloctanoïc acid. Furthermore, the results indicated that the total flavonoid (3.7± 0.1g/L Eq Quercetin) and total carotenoid (54.33± 1.1 mg/100 mL of fresh extract) contents and the antioxidant activities ((83.44 ± 0.98%) in concentrated extract of C. annuum fruit were significantly (p≤0.05) higher than those recorded in crude extract. They also showed that the MIC values ranged from 10 to 20 μg/mL. This confirmed the existence of significant activity against the bacterial strains tested. Our results revealed that Gram positive and negative microorganisms were affected by the tested concentrated extract. Moreover, this study indicated that the concentrate of the Capsicum annuum fruit effectively shows the best ability to scavenge the free radicals. This concentrated extract also presents some antimicrobial activity against six microorganisms.

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Section: Antimicrobial Activitysupporting

confidence: 72%

Chemical composition, antioxidant and antimicrobial activities of Capsicum annuum var. annuum concentrated extract obtained by reverse osmosis

Casimir¹,

Martin²,

Philippe³

et al. 2018

GSC Biol. and Pharm. Sci.

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“…It was observed that the activity of the normal eucalyptus oil and ampiclox were very similar as the measurements of the zones of inhibition are very close. This is in support of the antimicrobial activity of Eucalyptus citriodora against Salmonella typhii as reported by Akin-Osanaiye et al, 2007. This relates that the two oils are very potent against Xanthomonas axonopodis, Shigella dysenterine, Pseudomonas solanecearium, Streptococcus faecales, and Staphylococcus aureus but higher doses of the antimicrobial agents will be required in infections caused by Salmonella typhii and Erwinia carotovora. The essential oil and the normal eucalyptus oil have antimicrobial activities and thus confirmed the historical use of eucalyptus oil as an antibacterial agent (Kumar, 1988).…”

Section: Discussionsupporting

confidence: 84%

Phytochemical Analysis and Antimicrobial Properties of Eucalyptus torelliana Oils

Adekoya

Akeem

2021

FUOYEJET

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Normal oil and Essential oil from fresh leaves of Eucalyptus torelliana (F. Muell) were extracted using solvent (Soxhlet) and steam distillation extraction methods respectively. The leaves were screened for the presence of secondary metabolites and the extracted oils for their antimicrobial potentials. The phytochemical screening revealed the presence of Phytates (27.81 mg/g) Phytic acids (7.833mg/g) Oxalates (3.061mg/g) Tannins (2.457mg/g) Phenols (30.00%) Flavonoids (2.948%) Saponins (3.166%) and Alkaloids (2.84%). In addition to this the leaves were found to contain anthraquinone. The two oils extracted from the leaves of Eucalyptus torelliana were studied for their antimicrobial activity against the following isolated microorganisms: Xanthomonas axonopodis, Shigella dysenterine, Pseudomonas solanecearium, Streptococcus faecales, Staphylococcus aureus, Salmonella enterica, Erwinia carotovora, Salmonella typhi. The oils were found to inhibit all the microorganism isolates. The zone of inhibition exhibited by the extracts on the tested microorganism was between 22-6mm. The oil extracts compared favourably with Ampiclox used as a standard control. The results obtained from this study reveals that the oils extracted from Eucalyptus torelliana has antibacterial activities against enteric pathogens and the oil may be potential source of new antimicrobials against enteric organisms.Keywords- Enteric microorganisms, essential oil, Eucalyptus torelliana, secondary metabolites, solvent extraction

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“…Some recent studies show that E. camaldulensis oil exhibits a great antimicrobial and repellent activity (25,26). Eucamalol and epi-eucamalol were identified as potent repellents.…”

Section: Resultsmentioning

confidence: 99%

Variation of essential oil composition of Eucalyptus camaldulensis (myrtaceae) from the Montengero coastline

Grbović¹,

Orčić²,

Couladis³

et al. 2010

Acta per tech

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In the current study the essential oil obtained from the leaves of Eucalyptus camaldulensis plants collected from five localities of the Montenegro coastline was analyzed. The oil yield varied from 0.63 % (Kotor) up to 1.59% (Tivat). The chemical composition of the leaf essential oil was analyzed using GC-MS technique. Monoterpene hydrocarbons were a major class of compounds. Among them, dominant compounds were p-cymene (17.38-28.60%), ß-phellandrene (12.35-14.47%) and ß-pinene (0.94-11.48%). The second largest group was oxygenated monoterpenes with cryptone (4.97-7.25) and terpinene-4-ol (2.75-4.21%) as predominant. Besides high content of sesquiterpene alcohol spathulenol (7.83-14.15%) was found. According to the results obtained E. camaldulensis from Montenegro can be classified in the chemotype with low 1,8-cineole and high p-cymene and cryptone ratio

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Antimicrobial Activity of Oils and Extracts of Cymbopogon citratus (Lemon Grass), Eucalyptus citriodora and Eucalyptus camaldulensis

Cited by 24 publications

References 2 publications

Chemical composition, antioxidant and antimicrobial activities of Capsicum annuum var. annuum concentrated extract obtained by reverse osmosis

Chemical composition, antioxidant and antimicrobial activities of Capsicum annuum var. annuum concentrated extract obtained by reverse osmosis

Phytochemical Analysis and Antimicrobial Properties of Eucalyptus torelliana Oils

Variation of essential oil composition of Eucalyptus camaldulensis (myrtaceae) from the Montengero coastline

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