Antimicrobial, Proximate and Phytochemical Evaluation of Garlic (Allium sativum L) (Ex-Lugu Cultivars)

Olayide Obidi and Oluwadamilola Fagbore*
Department of Microbiology, University of Lagos, Nigeria


Corresponding Author: [email protected]; Tel: +2348137828579
Recieved Date: December 04, 2017; Accepted Date: January 22, 2018; Published Date: 08 February 2018
Citation: Obidi O. and Fagbore O. Antimicrobial, Proximate and Phytochemical Evaluation of Garlic (Allium sativum L.) (Ex-Lugu Cultivars). Trop J Nat Prod Res. 2018; 2(2):92-98. https://doi.org//10.26538/tjnpr/v2i2.7
Copyright: © 2018 Obidi and Fagbore. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
ABSTRACT

Due to the increasing rates of the evolution of resistant microorganisms to conventional antibiotics, the development of novel antimicrobials remains an area of intensive research in the field of Microbiology. The aqueous methanol and ethyl acetate extracts of Allium sativum var. Ex-Lugu were analysed for their proximate, phytochemical and antimicrobial properties. Gas chromatography-Mass spectrometry (GC-MS) was employed for the quantitative analysis of the extracts. Proximate analysis revealed the ex-lugu variety to be 12% richer in protein compared to the West African Food and Agricultural Organization (FAO) standard reference for composition of foods. Results of phytochemical and GC-MS analyses showed the presence of tannins, caryophyllene oxide and heptadecane-9-hexyl in the methanol extract (ME) but not in the aqueous (AE) and ethyl acetate (EE) extracts. ME (100 mg/mL) showed superior activity with zone of inhibition (ZOI) of 24 mm against Pseudomonas aeruginosa and Salmonella typhimurium. ME had a minimum inhibitory concentration (MIC) of 6.25 mg/mL against Enterococcus faecium and Escherichia coli which surpasses the other extracts while the minimum fungicidal concentration (MFC) was 25 mg/mL against C. albicans which was less than that of miconazole (50 mg/mL). EE had lesser MIC value (25 mg/mL) against P. aeruginosa compared to 50 mg/mL for ampicillin. There was significant difference (P < 0.05) in the antimicrobial effect of ME compared to the other extracts. This study has revealed the major and active phytochemical compounds in Allium sativum Ex-Lugu cultivar which might be of potential chemotherapeutic effect against infections caused by the test microorganisms.

Keywords: Allium sativum extract, antimicrobial activity, Phytochemical, proximate.
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ISSN: 2616-0684 (Print)
ISSN: 2616-0692 (Online)
DOI: 10.26538/tjnpr
ISI Impact Factor: 0.562
Index Copernicus Value (ICV) for 2017: 59.83

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