Antibacterial Activity Of Tabernaemontana Stapfiana Britten (Apocynaceae) Extracts

Antibacterial and phytochemical screening of methanolic, sequential extracts (hexane, dichloromethane, ethyl acetate and methanol) and alkaloid rich fractions of Tabernaemontana Stapfiana Britten was carried out. The phytochemical screening showed the presence of alkaloids, flavonoids, coumarins, ta...

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Bibliographic Details
Published in:African journal of traditional, complementary, and alternative medicines complementary, and alternative medicines, 2009-03, Vol.6 (2), p.186-194
Main Authors: Ruttoh, Ernest K, Tarus, Paul K, Bii, Christine C, Machocho, Alex K, Karimi, Lucas K, Okemo, Paul O
Format: Article
Language:English
Subjects:
Alkaloids - pharmacology
Anti-Bacterial Agents - pharmacology
Antibacterial
Bacteria - drug effects
Coumarins - pharmacology
Flavonoids - pharmacology
MBCs
Methicillin-Resistant Staphylococcus aureus - drug effects
Microbial Sensitivity Tests
MICs
Plant Extracts - chemistry
Plant Extracts - pharmacology
Plant Structures
Research Paper
Saponins - pharmacology
Tabernaemontana - chemistry
Tabernaemontana stapfiana
Tannins - pharmacology
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Summary:Antibacterial and phytochemical screening of methanolic, sequential extracts (hexane, dichloromethane, ethyl acetate and methanol) and alkaloid rich fractions of Tabernaemontana Stapfiana Britten was carried out. The phytochemical screening showed the presence of alkaloids, flavonoids, coumarins, tannins and saponins that have been associated with antimicrobial activity. The stem and root bark methanolic extracts showed good activity against the bacterial strains used including the multiple drug resistant Staphylococcus aureus strain with minimum inhibitory concentrations ranging from 15.6 to 500 mg/ml and minimum bactericidal concentrations ranging from 31.25 to 500 mg/ml. The sequential extracts of the root and stem bark had high antimicrobial activity with minimum inhibitory concentrations (MICs) ranging between 3.9 and 250 mg/ml and minimum bactericidal concentrations (MBCs) ranging between 7.8 and 500 mg/ml against the tested microorganisms. The dichloromethane extract of the alkaloid rich fractions however exhibited reduced antibacterial activities as compared to methanol and sequential extracts but the dichloromethane:methanol (4:1) mixture showed high activity with MICs ranging between 15.6 and 250 mg/ml. These antibacterial efficacy studies suggest that Tabernaemontana stapfiana Britten could be a source of antibacterial agents.
ISSN:0189-6016
2505-0044
0189-6016