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Basic Research Journal of Microbiology ISSN 2354-4082Vol. 4(4), pp. 42-46 July 2017

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Full Length Research Paper

Nutritional evaluation and antimicrobial effects of aqueous extract of unripe plantain (Musa paradisiaca) peels


*1Enemchukwu, Benneth Nnanyelugo, 1Ibiam, John Ama, 2Onyedinma, Emmanuel Ifeanyi, 1Nwali, Uchenna Ignatius


1Department of Science Laboratory Technology, Akanu Ibiam Federal Polytechnic, Unwana, P.M.B.1007, Afikpo, Ebonyi State, Nigeria.

2Michael Okpara University of Agriculture, Umudike, P.M.B. 7267, Umuahia, Abia State, Nigeria.


*Corresponding Author′s Email: achylesma@yahoo.com, Tel: +2348034009418


Received 29 March, 2017; Accepted 05 April, 2017; Published 07 August, 2017




The growing prevalence of antibiotic resistance amongst clinically important pathogens necessitates the search for potential healing powers in herbal plant. In this study therefore, nutritional composition and in vitro antimicrobial activities of aqueous extract of unripe plantain (Musa paradisiaca) peels were evaluated using the disc diffusion technique against Staphylococcus aureus, Escherichia coli, Micrococcus flavus and Pseudomonas aeruginosa. The microorganisms were isolated after subculture and purified and preliminary antimicrobial sensitivity test of the extract was carried out with the isolated microorganisms at different dilution of the extract (6.25mg/ml, 12.5mg/ml, 25mg/ml, 50mg/ml and 100mg/ml). The results of proximate analysis revealed the following: moisture (7.47±1.25%), ash (17.59±1.05%), fat (3.67±1.20 %), protein (6.5±1.40%) and carbohydrate (64.7±1.28%) with calorific value of 277.74±2.02Kcal/100g DM. Thus, the nutritional value of Musa paradisiaca peels is high and as such it could be used as feed additives. The extract had antimicrobial activities against Pseudomonas aeruginosa, Escherichia coli, Staphylococcus aureus and Micrococcus flavus with varying degrees. The minimum inhibitory concentration of the extract was determined to be 100mg/mL and the growth inhibition zones of 5mm  exhibited by the extract at 100mg/ml dilution, against Escherichia coli were significantly higher (P<0.05) compared to inhibition zones of 3mm for Staphylococcus auerus, 2mm for Micrococcus flavus and 2mm for Pseudomonas aeruginosa respectively at the same concentration. The findings in this prospective study indicated that unripe plantain peels contained appreciable amount of nutrients and antimicrobial properties and as such could be useful in ethno-medicine for the treatment of microbial infections caused by these microorganisms.


Keywords: Microorganisms, disc diffusion, growth inhibition zones.


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Basic Research Journal of Business Management and Accounts.

Basic Research Journal of Education Research and Review.

Basic Research Journal of Medicine and Clinical Sciences.

Basic Research Journal of Social and Political Sciences.

J. Microbiol.

Vol.4 No 4

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