Nanocapsulation of essential oils for preventing or curing infectious diseases alone or with antibiotic

A composition, an encapsulated composition and/or nanoparticles comprising at least one essential oil having a large spectrum antibacterial, antiparasitic, antifungal activity and/or a plant antipathogen, optionally at least one antibiotic and optionally a pharmaceutically acceptable carrier is disclosed. Methods for treating infectious diseases and especially bacterial, parasitic, fungal and/or plant infectious by using this composition, encapsulated composition and/or nanoparticles are also disclosed