Marcos Herraiz, SaraAlonso Fernández, SaraIrisarri, María JoséArroyo Díaz, JaimePonce Gordo, FranciscoGonzález Coloma, AzucenaNavarro Rocha, JulianaAzami-Conesa, IrisGómez Muñoz, María TeresaBailén, María2026-02-192026-02-192026Marcos-Herraiz, S., Alonso Fernández, S., Irisarri, M. J., Arroyo Díaz, J., Ponce-Gordo, F., González-Coloma, A., Navarro Rocha, J., Azami-Conesa, I., Gómez-Muñoz, M. T., & Bailén, M. (2026). Phytotherapeutic potential of Lamiaceae essential oils and their monoterpenes against Giardia duodenalis. Veterinary Parasitology, 343, 110702. https://doi.org/10.1016/j.vetpar.2026.1107020304-40171873-2550https://hdl.handle.net/11268/16847Lamiaceae and Asteraceae plant species have been widely used in Mediterranean ethnomedicine for gastrointestinal disorders. They are also known for their antioxidant, anti-inflammatory, anti-bacterial, anti-parasite, and anti-virus properties. Giardia duodenalis is the most prevalent intestinal protozoon in children and young dogs worldwide. Its zoonotic potential and frequent therapeutic failures with nitroimidazoles underscore the urgent need for alternative treatments. This study investigated the antigiardial activity of essential oils (EOs) from 22 medicinal plants belonging to Lamiaceae and Asteraceae, together with their major constituents. EO composition was determined by a metabolomic approach (GC-MS).engAttribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/Giardia iambliaLavandulaMenthajournal article10.1016/j.vetpar.2026.110702open accessHomeopatíaInvestigación médicaMedicina preventivaGoal 3: Ensure healthy lives and promote well-being for all at all ages