Journal of ethnopharmacology · 2026
Medicinal plants used to treat infectious diseases in French Polynesia: an ethnobotanical survey and antibacterial evaluation.
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Titton Doriane, Butaud Jean-François, Ho Raimana, Bourgeade-Delmas Sandra, Raharivelomanana Phila, Chassagne François
Аннотация
ETHNOPHARMACOLOGICAL RELEVANCE: In French Polynesia, traditional medicine remains an important component of primary healthcare and relies on nearly 300 medicinal plants, including species used against infectious diseases that are prevalent in the territory. However, anti-infective medicinal plants remain insufficiently documented and scientifically evaluated.
AIM OF THE STUDY: This study aimed to document medicinal plants used for common infectious disorders in the Society Islands and to assess, in their traditional forms, the antibacterial activity and cytotoxicity.
MATERIALS AND METHODS: A semi-structured survey was conducted with 85 participants across five Society Islands. Data were collected on 11 infectious disorders. Eight species and one traditional remedy were then selected and prepared according to field-documented practices. Antibacterial activity was evaluated by broth microdilution against nine bacterial strains, and cytotoxicity was assessed by MTT assay on Vero, hIEC-6, and HaCaT cells.
RESULTS: The survey documented 626 remedies involving 84 species from 49 families, mostly administered as oral fresh plant juices. Cutaneous and respiratory infections, together with leucorrhea (he'a), were the conditions most frequently treated with medicinal plants. Among the preparations tested, Thespesia populnea fruit exudate and Calophyllum inophyllum leaves showed the strongest antibacterial activity (MIC 8-512 μg/mL), supporting their traditional use. The he'a remedy was more active than Syzygium malaccense leaves alone. None of the tested preparations was cytotoxic according to the CC50 < 20 μg/mL threshold.
CONCLUSION: This study documents Polynesian anti-infective remedies, supports testing traditional preparations, and provides ethnopharmacological validation for Thespesia populnea, Calophyllum inophyllum, and Syzygium malaccense as Polynesian anti-infective medicinal plants.
AIM OF THE STUDY: This study aimed to document medicinal plants used for common infectious disorders in the Society Islands and to assess, in their traditional forms, the antibacterial activity and cytotoxicity.
MATERIALS AND METHODS: A semi-structured survey was conducted with 85 participants across five Society Islands. Data were collected on 11 infectious disorders. Eight species and one traditional remedy were then selected and prepared according to field-documented practices. Antibacterial activity was evaluated by broth microdilution against nine bacterial strains, and cytotoxicity was assessed by MTT assay on Vero, hIEC-6, and HaCaT cells.
RESULTS: The survey documented 626 remedies involving 84 species from 49 families, mostly administered as oral fresh plant juices. Cutaneous and respiratory infections, together with leucorrhea (he'a), were the conditions most frequently treated with medicinal plants. Among the preparations tested, Thespesia populnea fruit exudate and Calophyllum inophyllum leaves showed the strongest antibacterial activity (MIC 8-512 μg/mL), supporting their traditional use. The he'a remedy was more active than Syzygium malaccense leaves alone. None of the tested preparations was cytotoxic according to the CC50 < 20 μg/mL threshold.
CONCLUSION: This study documents Polynesian anti-infective remedies, supports testing traditional preparations, and provides ethnopharmacological validation for Thespesia populnea, Calophyllum inophyllum, and Syzygium malaccense as Polynesian anti-infective medicinal plants.