Fecha de publicación: 14/12/2000 Fuente: WIPO "apiculture" A non-pathogenic probiotic microorganism, Escherichia coli strain BU-230-98 ATCC Deposit No. 202226 is provided herein, as well as a formulation comprising at least one volatile fraction (VF) of a plant extract, the volatile fraction being prepared by steam distillation of the plant extract under reduced pressure and at a bath temperature not exceeding 38°C. Probiotic compositions comprising the probiotic microorganism and the formulation are further provided herein.