The present invention relates to a bacteriotherapy based on bacterial compositions for the treatment and/or the prevention of neurodegenerative diseases, wherein said composition comprises an effective amount of bacterial microorganisms belonging to the species Lactobacillus fermentum, Lactobacillus delbrueckii subsp. delbrueckii, Lactobacillus plantarum and Lactobacillus salivarius, and mixtures thereof.
