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Titre du document / Document title

Antimicrobial effect of leaf extracts of pigeon pea (Cajanus cajan (L.) millsp.) on some human pathogens

Auteur(s) / Author(s)

OKIGBO R. N. (1) ; OMODAMIRO O. D. (1) ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) Department of Microbiology, Michael Okpara University of Agriculture Umudike, Umuahia, Abia State, NIGERIA

Résumé / Abstract

Many human pathogens require serious attention in developing countries like Nigeria. Six pathogens were used for the study of the antimicrobial effect of Cajanus cajan leaf extract on some pathogens. Escherichia coli, Staphylococcus aureus, Proteus mirabilis, Salmonella typhi, and Klebsiella pneumoniae were the bacteria isolates and Candida albicans was the only yeast (fungi) isolate used. Solvents used for the extraction of active ingredients of the plant leaf were water (as the aqueous solvent), petroleum ether, ethanol, and chloroform/methanol mixture (as organic solvents). The antibacterial effect of the plant extract showed that the organic solvent extracts were inhibitory to E. coli, S. aureus, and S. typhi; the aqueous extract was inhibitory to E. coli and S. aureus; while K. pneumoniae and P. mirabilis showed resistance to all the extracts. The minimum inhibitory concentration value of the extracts on the organisms ranged between 0.125 and 0.25 mg/ml for E. coli, 0.125 mg/ml for S. aureus and 0.0325-0.0625 mg/ml for S. typhi. Cidal or static effect varied with solvent type of extract, concentrations of the leaf extracts, and the organisms. The active components of the plant extract have no cidal or static effect on the tested yeast (C. albicans). The antimicrobial effect of leaf extracts of C. cajan is discussed in relation to the problem of drug resistance in developing countries like Nigeria.

Revue / Journal Title

Journal of herbs, spices & medicinal plants    ISSN  1049-6475 

Source / Source

2006, vol. 12, no1-2, pp. 117-127 [11 page(s) (article)] (20 ref.)

Langue / Language

Anglais

Editeur / Publisher

Haworth Press, Binghamton, NY, ETATS-UNIS  (1992) (Revue)

Mots-clés anglais / English Keywords

Tropical zone

;

West Africa

;

Sub-Saharan Africa

;

Grain legume

;

Thallophyta

;

Fungi

;

Fungi Imperfecti

;

Africa

;

Micrococcales

;

Micrococcaceae

;

Spermatophyta

;

Angiospermae

;

Dicotyledones

;

Leguminosae

;

Bacteria

;

Enterobacteriaceae

;

Organic solvent

;

Candida albicans

;

Nigeria

;

Active substance

;

Antibacterial agent

;

Salmonella typhi

;

Staphylococcus aureus

;

Escherichia coli

;

Medicinal plant

;

Cajanus cajan

;

Extraction process

;

Klebsiella pneumoniae

;

Developing countries

;

Yeast

;

Human

;

Pathogenic

;

Pigeon pea

;

Plant leaf

;

Antimicrobial agent

;

Mots-clés français / French Keywords

Zone tropicale

;

Afrique Ouest

;

Afrique subsaharienne

;

Légumineuse grain

;

Thallophyta

;

Fungi

;

Fungi Imperfecti

;

Afrique

;

Micrococcales

;

Micrococcaceae

;

Spermatophyta

;

Angiospermae

;

Dicotyledones

;

Leguminosae

;

Bactérie

;

Enterobacteriaceae

;

Solvant organique

;

Candida albicans

;

Nigéria

;

Substance active

;

Antibactérien

;

Salmonella typhi

;

Staphylococcus aureus

;

Escherichia coli

;

Plante médicinale

;

Cajanus cajan

;

Procédé extraction

;

Klebsiella pneumoniae

;

Pays en développement

;

Levure

;

Homme

;

Pathogène

;

Pois d'Angole

;

Feuille végétal

;

Antimicrobien

;

Mots-clés espagnols / Spanish Keywords

Zona tropical

;

Africa occidental

;

Africa subsahariana

;

Leguminosa grano

;

Thallophyta

;

Fungi

;

Fungi Imperfecti

;

Africa

;

Micrococcales

;

Micrococcaceae

;

Spermatophyta

;

Angiospermae

;

Dicotyledones

;

Leguminosae

;

Bacteria

;

Enterobacteriaceae

;

Solvente orgánico

;

Candida albicans

;

Nigeria

;

Sustancia activa

;

Antibacteriano

;

Salmonella typhi

;

Staphylococcus aureus

;

Escherichia coli

;

Planta medicinal

;

Cajanus cajan

;

Procedimiento extracción

;

Klebsiella pneumoniae

;

Países en desarrollo

;

Levadura

;

Hombre

;

Patógeno

;

Guandul

;

Hoja vegetal

;

Antimicrobiano

;

Mots-clés d'auteur / Author Keywords

Antibacterial

;

human pathogen

;

medicinal plant

;

yeast

;

Nigeria

;

Localisation / Location

INIST-CNRS, Cote INIST : 26084, 35400015952303.0110

Nº notice refdoc (ud4) : 18464668



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