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Abstract

Methanolic extract of the exudates of Aloe otallensis and its effect on Leishmania aethopica Parasite

Background & objectives: Several plant products have been tested and found to possess antileishmanial activity. The present study was undertaken
to evaluate antileishmanial activity of methanolic extract of Aloe otallensis on the promastigot stage of Leishmania aethiopica comparing to
standard drugs and also tried to screen its phytochemical constitute.
Methods: Phytochemical screening was done using the method mentioned by Evan and Trease on methanolic extract exudates of Aloe otallensis
leaf. The extract was also evaluated for in vitro antileishmanial activity against Leishmania aethiopica which is found from the black lion hospital
parasitology unit. The result was compared to standard drug of Sodium stibogluconate, milfostin and paramomycin.
Result: The extract has a good antileishmaniacidal activity with an IC50 of 0.041 μg/ml on L. aethiopica (LDC/134). The experimental data shows
that relatively it has better activity than paramomycin and milfostin but less activity than sodium stibogluconate. The data analyses was done by
pad graph prison version 5 software after it was read by ELISA reader at the wave length of 650 nm. The phytochemical screening of the exudates
of aloe otallensis showed the presence of phenol, alkaloid and saponin.
Conclusion: The methanol extract of exudate of Aloe otallensis has a good anti leishmanisis activity and this may be attributed to phenol, alkaloid
and saponin presnt in the plant. But it needs further analysis for the conformation of which constituent present in much concentration and to
know which one have highest role.

Author(s):
Tesfaye Zerihun


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