Fuente: WIPO "olive table" The invention relates to methods for preparing an olive (Olea europaea subsp. europaea), preferably acebuche (Olea europaea subsp. europaea var. sylvestris) composition, the olive or acebuche composition as prepared, and uses thereof in the prevention or treatment of a bacterial or fungal infection in mammals, preferably infection by antibiotic resistant or multi-resistant bacteria. Other uses relate to functional food additives, in particular an animal feed additive, or to uses in cosmetics.