Systematic review on traditional medicinal plants used for the treatment of malaria in Ethiopia: trends and perspectives

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Abstract

Background

Ethiopia is endowed with abundant medicinal plant resources and traditional medicinal practices. However, available research evidence on indigenous anti-malarial plants is highly fragmented in the country. The present systematic review attempted to explore, synthesize and compile ethno-medicinal research evidence on anti-malarial medicinal plants in Ethiopia.

Methods

A systematic web search analysis and review was conducted on research literature pertaining to medicinal plants used for traditional malaria treatment in Ethiopia. Data were collected from a total of 82 Ethiopian studies meeting specific inclusion criteria including published research articles and unpublished thesis reports. SPSS Version 16 was used to summarize relevant ethno-botanical/medicinal information using descriptive statistics, frequency, percentage, tables, and bar graphs.

Results

A total of 200 different plant species (from 71 families) used for traditional malaria treatment were identified in different parts of Ethiopia. Distribution and usage pattern of anti-malarial plants showed substantial variability across different geographic settings. A higher diversity of anti-malarial plants was reported from western and southwestern parts of the country. Analysis of ethno-medicinal recipes indicated that mainly fresh leaves were used for preparation of remedies. Decoction, concoction and eating/chewing were found to be the most frequently employed herbal remedy preparation methods. Notably, anti-malarial herbal remedies were administered by oral route. Information on potential side effects of anti-malarial herbal preparations was patchy. However, some anti-malarial plants were reported to have potentially serious side effects using different local antidotes and some specific contra-indications.

Conclusion

The study highlighted a rich diversity of indigenous anti-malarial medicinal plants with equally divergent herbal remedy preparation and use pattern in Ethiopia. Baseline information gaps were observed in key geographic settings. Likewise, herbal remedy toxicity risks and countermeasures generally entailed more exhaustive investigation. Experimental research and advanced chemical analysis are also required to validate the therapeutic potential of anti-malarial compounds from promising plant species.

Electronic supplementary material

The online version of this article (doi:10.1186/s12936-017-1953-2) contains supplementary material, which is available to authorized users.

Related collections

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Ethnobotanical study of medicinal plants used by people in Zegie Peninsula, Northwestern Ethiopia

Tilahun Teklehaymanot, Mirutse Giday (2007)

An ethnobotanical study was conducted from October 2005 to June 2006 to investigate the uses of medicinal plants by people in Zegie Peninsula, northwestern Ethiopia. Information was gathered from 200 people: 70 female and 130 males, using semistructured questionnaire. Of which, six were male local healers. The informants, except the healers, were selected randomly and no appointment was made prior to the visits. Informant consensus factor (ICF) for category of aliments and the fidelity level (FL) of the medicinal plants were determined. Sixty-seven medicinal plants used as a cure for 52 aliments were documented. They are distributed across 42 families and 64 genera. The most frequently utilized plant part was the underground part (root/rhizome/bulb) (42%). The largest number of remedies was used to treat gastrointestinal disorder and parasites infections (22.8%) followed by external injuries and parasites infections (22.1%). The administration routes are oral (51.4%), external (38.6%), nasal (7.9%), and ear (2.1%). The medicinal plants that were presumed to be effective in treating a certain category of disease, such as 'mich' and febrile diseases (0.80) had higher ICF values. This probably indicates a high incidence of these types of diseases in the region, possibly due to the poor socio-economic and sanitary conditions of this people. The medicinal plants that are widely used by the local people or used as a remedy for a specific aliment have higher FL values (Carissa spinarum, Clausena anisata, Acokanthera schimperi, Calpurnia aurea, Ficus thonningii, and Cyphostemma junceum) than those that are less popular or used to treat more than one type of aliments (Plumbago zeylanicum, Dorstenia barnimiana).

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Medicinal plants of the Meinit ethnic group of Ethiopia: an ethnobotanical study.

Mirutse Giday, Zemede Asfaw, Zerihun Woldu (2009)

The majority of the Ethiopian people, including the Meinit ethnic group, are highly dependent on medicinal plants for their day-to-day public healthcare and veterinary needs. The existence of medicinal plants and the associated knowledge is, however, currently being threatened mainly due to deforestation, environmental degradation and acculturation. Thus, there is an urgent need to document and analyse the knowledge. The aim of this study was to record and analyse local knowledge of the Meinit people of Ethiopia on the use of plants to treat or cure diseases of humans and domestic animals. Ethnobotanical data were gathered through series of individual interviews conducted with selected informants representing different social groups within the Meinit Community. Fidelity Level (FL) values were calculated to estimate the healing potentials of claimed medicinal plants. The study revealed 51 medicinal plants, most of which were herbs. Root was the most frequently used part in remedy preparation. The majority of medicinal plants were not cultivated. Significantly higher numbers of medicinal plants were cited by men than women, by older people than younger ones and by illiterate people than literate ones. Rumex nepalensis Spreng., Leucas deflexa Hook.f. and Embelia schimperi Vatke were the medicinal plants that scored the highest FL values. Acculturation of the young generation has been found to be the major treat to the continuation of traditional medical knowledge and practice in the study area. Efforts should, therefore, be made to incorporate traditional medicine in school curricula so that younger people could appreciate its usefulness. Priority for further Pharmaco-chemical investigation should be given to plants that scored highest FL values, as such values could indicate better efficacy.

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Medicinal plants of the Shinasha, Agew-awi and Amhara peoples in northwest Ethiopia.

Mirutse Giday, Tilahun Teklehaymanot, Abebe Animut … (2007)

Study was conducted in two sub-districts in northwestern Ethiopia to compile and analyse knowledge on the use of medicinal plants for treatment or prevention of human ailments by three socio-cultural groups, namely the Amharas, Shinashas and Agew-Awis. Data were mainly collected through individual interviews conducted with selected knowledgeable farmers and professional healers of the three socio-cultural groups. A total of 76 medicinal plants belonging to 48 families were documented, of which 50 species were reported by the Amharas, 25 by the Shinashas and 20 by the Agew-Awis. Large proportions of medicinal plants were found to have been used for the treatments of gastro-intestinal complaints (26%), skin diseases (24%) and malaria (22%). Relatively, higher numbers of informants agreed on the use of Croton macrostachyus against malaria (21%), Cynoglossum coeruleum against 'mich', illness mainly characterized by fever, headache and sweating (18%) and Zehneria scabra against malaria (13%). The species Croton Macrostachyus, Calpurnia aurea, Clematis hirsuta and Plumbago zeylanica were found to have the highest diversity of medicinal applications. We recommend that priority for further investigation should be given to medicinal plants with higher informant consensuses, as this could indicate their better efficacy. Measures are needed to conserve plants that are reported as scarce in the study area but still are only harvested from the wild.

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Author and article information

Contributors

Getachew Alebie: gechalebie@gmail.com

Befikadu Urga: fikeurga@gmail.com

Amha Worku: zamaranolil2@gmail.com

Journal

Journal ID (nlm-ta): Malar J

Journal ID (iso-abbrev): Malar. J

Title: Malaria Journal

Publisher: BioMed Central (London )

ISSN (Electronic): 1475-2875

Publication date (Electronic): 1 August 2017

Publication date PMC-release: 1 August 2017

Publication date Collection: 2017

Volume: 16

Electronic Location Identifier: 307

Affiliations

[1 ]GRID grid.449426.9, Department of Biology, , Jigjiga University, ; P.O. Box-1020, Jijiga, Ethiopia

[2 ]GRID grid.449426.9, College of Veterinary Medicine, , Jigjiga University, ; P.O.Box-1020, Jijiga, Ethiopia

Article

Publisher ID: 1953

DOI: 10.1186/s12936-017-1953-2

PMC ID: 5540187

PubMed ID: 28764723

SO-VID: 800e21ad-d341-41f5-b094-e2314eb1b06f

License:

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License ( http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver ( http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.