Aqueous extracts of Flacourtia indica, Swartzia madagascariensis and Ximenia caffra are strong antibacterial agents against Shigella spp., Salmonella typhi and Escherichia coli O157
| Autor: | Constance Chingwaru, Walter Chingwaru, Tanja Bagar |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
Traditional medicine biology Chemistry Extraction (chemistry) Ximenia caffra Plant Science Salmonella typhi medicine.disease_cause Antimicrobial biology.organism_classification 01 natural sciences Cold water extraction 0104 chemical sciences Hot water extraction 010404 medicinal & biomolecular chemistry Flacourtia indica medicine Shigella 010606 plant biology & botany |
| Zdroj: | South African Journal of Botany. 128:119-127 |
| ISSN: | 0254-6299 |
| Popis: | Aqueous extraction methods, particularly steeping in hot water, are frequently adopted as methods of choice in traditional medicine (TM). Moreover, other more modern extraction methods tend to utilise sophisticated tools and a number of organic solvents. Unfortunately, the comparative value of the aqueous extraction methods as used in traditional medicine in relation to the other methods has remained largely undocumented. This study sought to establish the comparative antimicrobial activities and composition of Flacourtia indica bark, Swartzia madagascariensis leaf and Ximenia caffra leaf extracts obtained using (i) hot water extraction (THWE), (ii) cold water extraction (CWEC) and (iii) ethanolic extraction (EEC) methods against putative isolates of Shigella spp., Salmonella typhi and Escherichia coli O157. Bacteriostatic and bactericidal effects of the extracts were determined using the standard well diffusion assay. The hot water extracts (THWE) and the cold water extracts (desiccated) (CWEC) were shown to have significantly greater inhibitory activities then the ethanolic extracts (EEC) (desiccated) against Shigella spp. and S. typhi (p |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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