Antibacterial activities of the methanol extracts of ten Cameroonian vegetables against Gram-negative multidrug-resistant bacteria

BMC Complementary and Alternative Medicine

Victor Kuete¹  Jules R Kuiate¹  Marius Stefan²  Stephen T Lacmata¹  Marius Mihasan²  Jaurès AK Noumedem² 

[1]Department of Biochemistry, Faculty of Science, University of Dschang, P.O. Box 67, Dschang, Cameroon

[2]Department of Biochemistry and Molecular Biology, Faculty of Biology, Alexandru Ioan Cuza University, Iasi, Romania

关键词: Vegetable;    Extract;    Multi-drug resistant;    Gram-negative bacteria;    Antibacterial;   

Others  :  1231124
DOI  :  10.1186/1472-6882-13-26

 received in 2012-09-28, accepted in 2013-01-28,  发布年份 2013

【 摘 要 】

Background

Many edible plants are used in Cameroon since ancient time to control microbial infections. This study was designed at evaluating the antibacterial activities of the methanol extracts of ten Cameroonian vegetables against a panel of twenty nine Gram negative bacteria including multi-drug resistant (MDR) strains.

Methods

The broth microdilution method was used to determine the Minimal Inhibitory Concentrations (MIC) and the Minimal Bactericidal Concentrations (MBC) of the studied extracts. When chloramphenicol was used as a reference antibiotic, the MICs were also determined in the presence of Phenylalanine-Arginine β-Naphtylamide (PAβN), an efflux pumps inhibitor (EPI). The phytochemical screening of the extracts was performed using standard methods.

Results

All tested extracts exhibited antibacterial activities, with the MIC values varying from 128 to 1024 mg/L. The studied extracts showed large spectra of action, those from L. sativa, S. edule, C. pepo and S. nigrum being active on all the 29 bacterial strains tested meanwhile those from Amaranthus hybridus, Vernonia hymenolepsis, Lactuca.carpensis and Manihot esculenta were active on 96.55% of the strains used. The plant extracts were assessed for the presence of large classes of secondary metabolites: alkaloids, anthocyanins, anthraquinones, flavonoids, phenols, saponins, steroids, tannins and triterpenes. Each studied plant extract was found to contain compounds belonging to at least two of the above mentioned classes.

Conclusion

These results confirm the traditional claims and provide promising baseline information for the potential use of the tested vegetables in the fight against bacterial infections involving MDR phenotypes.

【 授权许可】

   
2013 Noumedem et al; licensee BioMed Central Ltd.

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