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Traditional Ghanaian Medicines Show Promise Against Tropical Diseases, Reveals Study

by Colleen Fleiss on January 2, 2021 at 8:57 PM
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Traditional Ghanaian Medicines Show Promise Against Tropical Diseases, Reveals Study

Traditional Ghanaian drugs were found to work against the following neglected tropical diseases (NTDs) - schistosomiasis, onchocerciasis, and lymphatic filariasis. These three diseases are endemic to Ghana. The findings of the study are published in PLOS Neglected Tropical Diseases.

The major intervention for NTDs in Ghana is currently mass drug administration of a few repeatedly recycled drugs, which can lead to reduced efficacy and the emergence of drug resistance. Chronic infections of schistosomiasis, onchocerciasis and lymphatic filariasis can be fatal.

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Schistosomiasis is caused by the blood flukes Schistosome haematobium and S. mansoni. Onchocerciasis, or river blindness, is caused by the parasitic worm Onchocerca volvulus. Lymphatic filariasis, also called elephantiasis, is caused by the parasitic filarial worm Wuchereria bancrofti.

In the new work, Dorcas Osei-Safo of the University of Ghana, and colleagues obtained--from the Ghana Federation of Traditional Medicines Practitioners Association--15 traditional medicines used for treating NTDs in local communities. The medicines were available in aqueous herbal preparations or dried powdered herbs. In all cases, crude extracts were prepared from the herbs and screened in the laboratory for their ability to treat various NTDs.
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Two extracts, NTD-B4-DCM and NTD-B7-DCM, displayed high activity against S. mansoni adult worms, decreasing the movement of the worms by 78.4% and 84.3% respectively. A different extract, NTD-B2-DCM, was the most active against adult Onchocera onchengi worms, killing 100% of males and more than 60% of females.

Eight of 26 crude extracts tested, including NTD-B4-DCM and NTD-B2-DCM, also exhibited good activity against trypanosomes--parasites that cause other human diseases but weren't the original targets of the traditional medicines.

"By embracing indigenous knowledge systems which have evolved over centuries, we can potentially unlock a wealth of untapped research and shape it by conducting sound scientific investigations to produce safe, efficacious and good quality remedies," the researchers say.

Source: Eurekalert
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