Medicinal plants of the mountain region of Kahuzi-Biega in the Democratic Republic of Congo: Uses, accessibility and consensus among traditional therapists

peer reviewedFor ethnobotanists, aspects such as the influence of a plant's accessibility on its frequency of use, consensus among traditional therapists over the relationships between plants and diseases and the degree of fidelity to a plant for a given category of ailments are essential to assess a medicinal tradition, but difficult to interpret. We explored these aspects through a study based on semi-structured interviews with 88 traditional therapists from the Batwa, Havu, Shi and Tembo communities near the montane forests of the Kahuzi-Biega National Park, in South Kivu Province in eastern DRC. Our survey showed that 77 plant species are used to treat pathologies grouped into 18 categories of ailments, the most frequent being digestive disorders and infections. Leaves and bark are the parts most frequently used, usually in recipes involving a single plant and mainly prepared as aqueous solutions. Although there is a positive correlation between the accessibility of plants and the frequency of their use (H = 17.64; p < 0.001), some less accessible forest plants have very high use frequencies. Consensus between traditional therapists is high overall, especially for musculo-skeletal disorders (= 0.83) and infections (= 0.80). Although the degree of fidelity to a plant for a given category of ailments is low overall, it is always high for at least one plant in all categories. Our results, although exploratory, suggest that certain medicinal traditions are well rooted in the region's local communities. This assumes a good local knowledge of medicinal plants, intergenerational transmission of that knowledge and a degree of cooperation between traditional therapists. Further studies are needed to assess these different aspects with greater precision

Medicinal plants of the mountain region of Kahuzi-Biega in the Democratic Republic of Congo: Uses, accessibility and consensus among traditional therapists

peer reviewedFor ethnobotanists, aspects such as the influence of a plant's accessibility on its frequency of use, consensus among traditional therapists over the relationships between plants and diseases and the degree of fidelity to a plant for a given category of ailments are essential to assess a medicinal tradition, but difficult to interpret. We explored these aspects through a study based on semi-structured interviews with 88 traditional therapists from the Batwa, Havu, Shi and Tembo communities near the montane forests of the Kahuzi-Biega National Park, in South Kivu Province in eastern DRC. Our survey showed that 77 plant species are used to treat pathologies grouped into 18 categories of ailments, the most frequent being digestive disorders and infections. Leaves and bark are the parts most frequently used, usually in recipes involving a single plant and mainly prepared as aqueous solutions. Although there is a positive correlation between the accessibility of plants and the frequency of their use (H = 17.64; p < 0.001), some less accessible forest plants have very high use frequencies. Consensus between traditional therapists is high overall, especially for musculo-skeletal disorders (= 0.83) and infections (= 0.80). Although the degree of fidelity to a plant for a given category of ailments is low overall, it is always high for at least one plant in all categories. Our results, although exploratory, suggest that certain medicinal traditions are well rooted in the region's local communities. This assumes a good local knowledge of medicinal plants, intergenerational transmission of that knowledge and a degree of cooperation between traditional therapists. Further studies are needed to assess these different aspects with greater precision

Characterization of traditional healers in the mountain forest region of Kahuzi-biega, South-kivu, DR Congo [Caractérisation des tradipraticiens de la région de forêt montagneuse de Kahuzi-Biega, sud-Kivu, RD Congo]

Description of the subject. Several ethnobotanical studies have demonstrated links between traditional medicine practices and the ethnicity and geographical location of healers, while many others have concluded the opposite. This study deals with the typology of traditional healers in the mountain region of Kahuzi-Biega. Objectives. The goal is to understand whether the typology of traditional healers is related to their inter-ethnic and inter-zonal differences, based on diseases treated and plants used. Method. Ethnobotanical surveys were conducted using the “PSSVV” method. This involved 88 traditional healers recognized as “specialists” in 33 villages adjacent to the forest of Kahuzi-Biega, in DR Congo. Multivariate analysis (clustering, ordination, Mantel test, IndVal) were applied to establish typologies of traditional healers. Results. Multivariate analyses showed that ethnicity and geographical location did not explain the practices and knowledge of healers. However, by using the IndVal method, differences were observed in their degree of specialization. Non-specialized healers (70%) could be distinguished from specialized healers (30%). Two clear groups of specialists emerged; those who treat bone trauma and those who treat obstetric-gynecological complaints. The Mantel correlation test revealed a positive association (r = 0.134, p < 0.05) between the “healers-plants” and “healers-diseases” matrices. This indicates that healers who treat similar diseases use similar herbs. Both typologies have shown their preferences for forest species (81%), especially trees (51%). Conclusions. This exploratory study suggests that traditional healers are characterized based on their specializations. This result helps in creating strategies to preserve local traditional knowledge and apply it to the conservation of species. © 2016, FAC UNIV SCIENCES AGRONOMIQUES GEMBLOUX. All rights reserved