Antileishmanial activity of Aloe Secundiflora plant extracts against Leishmania Major (2013).

Ogeto T. K, Odhiambo R. A, Shivairo, R. S, Muleke C. I, Osero B. O, Anjili C, Ingonga J. M, Osuga I. M


Human leishmaniases are a spectrum of diseases caused by protozoan parasites of the genus Leishmania. In this study antileishmanial activity of the methanolic and water leaf extracts from Aloe secundiflora plant were analysed by determining the minimum inhibition concentration (MIC), nitric oxide (NO) production stimulation, infection rates (IR) and multiplication index (MI). Cytotoxicity of these plant extracts was also assessed. The MIC levels of water and methanolic plant extracts, amphotericin B and pentostam were 2000 µg/ml, 1000 µg/ml, 125µg/ml and 250 µg/ml respectively against Leishamnia major promastigotes. This study revealed that water and methanolic plant extracts significantly inhibited the growth of Leishmania parasites (P ? 0.05) as compared to amphotericin B with respect to the parasite infection rates and MIC levels. The IC50 for the water and methanolic plant extracts was 279.488 µg/ml and 42.824 µg/ml respectively. The elevated inhibitory activity observed in this study against Leishmania major parasites provides evidence and basis for their potential use as therapeutic agents against leishmaniasis.

Key words: Aloe secundiflora, Plant extracts, Leishmania major and Minimum Inhibition Concentrations (MIC)

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