alexa Inhibitory Activity of Combretum zeyheri and its S9 Metabolites against Escherichia coli, Bacillus subtilis and Candida albicans | OMICS International | Abstract
ISSN: 1948-5948

Journal of Microbial & Biochemical Technology
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Research Article

Inhibitory Activity of Combretum zeyheri and its S9 Metabolites against Escherichia coli, Bacillus subtilis and Candida albicans

Charlotte Masengu1, Faith Zimba1, Rumbidzai Mangoyi2 and Stanley Mukanganyama2*

1School of Pharmacy, College of Health Sciences, University of Zimbabwe, Mt. Pleasant, Harare, Zimbabwe

2Department of Biochemistry, University of Zimbabwe, Mt. Pleasant, Harare, Zimbabwe

*Corresponding Author:
Dr. Stanley Mukanganyama
Biomolecular Interactions Analyses Group, Department of Biochemistry
University of Zimbabwe, P.O. Box MP 167, Mt. Pleasant
Harare, Zimbabwe
Tel: 263-4-2917638
E-mail: [email protected], [email protected]

Received date: March 04, 2014; Accepted date: May 05, 2014; Published date: May 09, 2014

Citation: Masengu C, Zimba F, Mangoyi R, Mukanganyama S (2014) Inhibitory Activity of Combretum zeyheri and its S9 Metabolites against Escherichia coli, Bacillus subtilis and Candida albicans. J Microb Biochem Technol 6:228-235. doi: 10.4172/1948-5948.1000149

Copyright: © 2014 Masengu C, et al. 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

Medicinal plants are therapeutic resources used by traditional population for health care, thus, it is important to evaluate the mechanism of action of herbal plants so as to validate their efficacy and avoid possible toxic effects. The water and methanol leaf extracts of Combretum zeyheri, medicinal plant from Zimbabwe were screened for antibacterial activity against Escherichia Coli and Bacillus subtilis using the agar disc diffusion method. Minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) values of the plant extracts were determined using the broth dilution method. Drug transport assays were conducted to test the potential of plant extracts as inhibitors of drug efflux using in Rhodamine 6G. The effect of Combretum zeyheri plant S9 metabolites on growth of Candida albicans was investigated using S9 fractions from 8 week old male Sprague-Dawley rats. Results showed that the plant extract had antibacterial activity against E. coli and B. subtilis, with the aqueous extract exhibiting a greater inhibition of growth than the methanol extract. The plant extract also showed inhibitory effects on drug efflux in all the three organisms suggesting that the antimicrobial actions could partly be due to inhibition of drug efflux pumps. The S9 metabolites of C. zeyheri also had an inhibitory effect on growth of C. albicans, suggesting they may be inhibitors of the growth of Candida albicans in vivo. Combretum zeyheri, therefore, has significant antimicrobial activity and, therefore, has a basis for its use in traditional herbal medications for the treatment of a broad range of microbial infections. The antifungal effects may be mediated via both parent extracts and their metabolites.

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