RT Journal Article T1 Antimicrobial activity of ethanolic and aqueous extracts of medicinally used tree ferns Alsophila cuspidata and Cyathea microdonta T2 Actividad antimicrobiana de extractos en etanol y agua de los helechos arborescentes usados medicinalmente Alsophila cuspidata y Cyathea microdonta A1 Longtine, Charlie A1 Tejedor, Adrian K1 Helechos - Perú AB Medicinal plants are important components of traditional medicine and sourcesof novel antimicrobial compounds against drug resistance pathogen strains.This study tested the antimicrobial activity of ethanolic and aqueous extractsof medicinally used Neotropical tree ferns Cyathea microdonta and Alsophilacuspidata against gram positive bacteria and gram negative bacteria usingthe Kirby-Bauer disc diffusion method. Highest antimicrobial activity wasobserved in ethanolic extracts, and extracts were more active against grampositive bacteria than gram negative bacteria. No difference was observedin antimicrobial activity between species or between extracts made from theleaves, stipe, or caudex. These results suggest that the traditional use of treefern mucilage as a topical agent for cuts and leishmaniasis lesions may reducerisk of secondary infection with skin bacteria such as Staphylococcus aureus,and that Neotropical Cyatheaceae are a potential source of novel antimicrobialcompounds. PB Universidad de Málaga. Servicio de Publicaciones e Intercambio Científico SN 0210-9506 YR 2017 FD 2017 LK https://hdl.handle.net/10630/15826 UL https://hdl.handle.net/10630/15826 LA eng NO Acta Botánica Malacitana, Vol. 42, nº 1, 2017, págs. 119-123 DS RIUMA. Repositorio Institucional de la Universidad de Málaga RD 27 feb 2026