Abstract
The antimicrobial effect of aqueous extract of lemongrass (Cymbopogon citratus) on some isolated microorganisms under varying parameters was investigated. Aqueous extract of lemongrass was prepared and its antimicrobial effect was evaluated against isolated bacteria (Staphylococcus aureus, Escherichia coli and Bacillus cereus) and fungi (Aspergillus flavus and Candida albicans) at varying temperature (40, 60 and 800C) and concentration (10-1, 10-2, 10-4, 10-8 and 10-16 mol/L) of the lemongrass aqueous extract shows that the extract was resisted by Escherichia coli, Bacillus cereus, Aspergillus flavus and Candida albicans. The aqueous C. citratus was able to inhibit the growth of Staphylococcus aureus and this inhibition increases as the concentration of the aqueous extract increase irrespective of the temperature of extraction. The aqueous extract of C. citratus is a tremendous antimicrobial substance especially towards Staphylococcus aureus.
Highlights
Lemongrass scientifically is known as Cymbopogon citratus and it belongs to the Poaceae family which counts more than 635 genera and 9000 species (Majewska et al, 2019)
In Eastern and Western India it is used for insecticides, cosmetics products, and for gastrointestinal disorders and fevers therapy (Desai. and Parikh, 2012).This study investigated the antimicrobial effect of aqueous extract of lemongrass (C. citratus) on some isolated microorganisms under varying parameters
The microbial isolates (Staphylococcus aureus, Escherichia coli, Bacillus cereus, Aspergillus flavus and Candida albicans) used in this study were obtained from the Department of Microbiology Ahmadu Bello University (ABU), Zaria
Summary
Lemongrass scientifically is known as Cymbopogon citratus and it belongs to the Poaceae family which counts more than 635 genera and 9000 species (Majewska et al, 2019). The genus Cymbopogon has been reviewed comprehensively in several articles (Avoseh et al, 2015; Haque et al, 2018).Nambiar and Matela (2012) reported that lemongrass grows well in both tropical and subtropical climates with around 900m elevation. Various chemical compounds of C. citratus essential oil has been to show some antimicrobial characteristics (Bassolé et al, 2011), deplete oxidants (Mansour et al, 2015), antiparasitic (Kpoviesi et al, 2014), insecticidal, and insect repellent actions (Brugger et al, 2019). Ekpenyong & Akpan, (2017) has reported that lemongrass antimicrobial and antioxidant properties has be used for preservation of food as an alternative to chemical products. Avoseh et al, (2015) reported that C. citratus is applied in Nigeria for stomach upset, malaria treatment, insect repellent and as an antioxidant. In Eastern and Western India it is used for insecticides, cosmetics products, and for gastrointestinal disorders and fevers therapy (Desai. and Parikh, 2012).This study investigated the antimicrobial effect of aqueous extract of lemongrass (C. citratus) on some isolated microorganisms under varying parameters
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