Antimicrobial activity of the leaf extracts of <i>Moringa oleifera</i> and <i>Jatropha curcas</I> on pathogenic bacteria

Abstract

This study evaluates the antimicrobial activity of the leaf extracts of Moringa oleifera and Jatropha curcas against Staphylococcus aureus and Escherichia coli. Different concentrations of the extracts were subjected to these organisms in which Moringa oleifera showed a higher zone of inhibition on Staphylococcus aureus (2.8 cm) while on E. coli (2.4 cm) while Jatropha curcas showed a higher zone of inhibition on E. coli (2.6 cm) while on S. aureus (1.80 cm). The minimum inhibitory concentration (MIC) of Moringa oleifera extract on E. coli and S. aureus were 0.250 mg/ml and 0.125 mg/ml respectively while MIC of Jatropha curcas extract on test organisms was 0.125 mg/ml. The quantitative phytochemical screening in g/kg revealed the presence of flavonoid 36 and 21, alkaloids 92 and 39, tannins 7.4 and 5.6, saponins 115.0 and 53.5, cyanogenic glycosides 8.4 and 14.5 for M. oleifera and J. curcas respectively. The observed antimicrobial properties could be due to the presence of these bioactive compounds and further substantiates the use of Moringa oleifera and Jatropha curcas leaf extracts in medicine. The extracts in correct doses can successfully be used in vivo to inhibit and eventually kill the test bacteria used in this study.

Effects of Adding Moringa oleifera Leaves Powder on the Nutritional Properties, Lipid Oxidation and Microbial Growth in Ground Beef during Cold Storage

“…The decrease in microbial count could be attributed to MOLP being an excellent source of phytochemicals such as flavonoids and phenolic acids, which are used as antimicrobials agents [57]. Moringa oleifera has a strong antimicrobial activity, with this being in line with the work of Okorondu [58], which notes that MO quantitative phytochemical screening showed that it contains alkanoids, flavonoids, cyanogenic glycosides, tannins, and saponins that can be successfully used to reduce and eventually destroy microbes in appropriate dosages. Values expressed as mean ± standard deviation.…”

CONTROLE DE COLIFORMES EM EFLUENTES COM A UTILIZAÇÃO DE ÓLEO DE Eucalyptus citriodorus OU EXTRATO DE SEMENTE DA Moringa oleifera

“…Visualiza-se na figura 9 que a quantidade de bactérias E. coli foi diminuindo à medida que a concentração do extrato das sementes de moringa foi aumentada, no entanto, atingindo uma maior eficiência a partir de 10% de concentração em volume no efluente não tratado. Okorondu et al (2013) avaliaram a atividade antimicrobiana do extrato foliar de Moringa oleifera sobre Staphylococcus aureus e Escherichia coli. Estes microrganismos foram submetidos a diferentes concentrações dos extratos.…”

Chemical and antimicrobial properties of Moringa (Moringa oleifera) root and its impact on water quality

“…Many studies have explored antimicrobial effects of Moringa leaf powder on waterborne bacteria. The leaf powder of Moringa inhibits E. coli and Staphylococcus aureus (Okorondu et al, 2013). These properties are further shown in its effectiveness in decreasing bacteria when used as a substitute for hand soap (Torondel et al, 2014).…”