Abstract
Eleven plants used in the Cameroonian traditional medicine for the treatment of some parasitic infections were tested for their activity on the promastigote form of Leishmania donovani. After incubation with different plant extracts at doses of 1600, 800, 400 and 200microgram/mL, the evaluation of the cell viability was done by the trypan blue exclusion technique and by flow cytometry. This study shows that 48h after incubation of promastigotes with plant extract, Solanocia mannii and Solanum torvum significantly inhibited the proliferation of promastigotes in culture with IC50 of 60.78±5.05 and 96.08±4.39 using the trypan blue exclusion technique. In addition, IC50 of 43.91±6.49 and 86.13±4.30 were obtained using the flow cytometry technique. Furthermore, 24h after incubation of promastigotes with the Solanocia mannii and Solanum torvum, there was significant disruption of their long spindle shaped bodies. The results of this study support the popular uses of these plants for the treatment of some parasitic infections in Cameroonian folk medicine.
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