Fecha de publicación: 25/11/2021 Fuente: WIPO "apis mellifera" The invention relates to a composition for the treatment of American Foulbrood in bees, a disease in the brood of honeybee {Apis mellifera) caused by spore-forming bacteria Paenibacillus larvae, prepared on the basis of fungal extract, comprising antibacterial methanolic extract obtained from the fruiting bodies of a polyporoid fungus selected from: Heterobasidion annosum, Oligopoms guttulatus and Tyromyces fissilis, preferably Tyromyces fissilis, and to a methanolic extract from such a polyporoid fungus, preferably Tyromyces fissilis, for use in the treatment and/or prophylaxis of American Foulbrood in bees.