The present invention relates to selected strains of lactic acid bacteria for use in the treatment of infections caused by pathogenic bacteria belonging to the propionibacterium acnes species, in particular for use in the preventive and / or curative treatment of dermatitis in general, seborrheic dermatitis, rosacea, eczema. and acne. In addition, the present invention relates to a composition comprising a mixture comprising or alternatively consisting of selected strains of lactic acid bacteria for use in the treatment of infections caused by pathogenic bacteria belonging to the propionibacterium acnes species, in particular for use in the treatment. preventive and / or curative of dermatitis in general, seborrheic dermatitis, rosacea and acne. the composition comprising said mixture of selected lactic acid bacteria strains is formulated in a pharmaceutical form for oral use (novel food, supplement or medical device or pharmaceutical composition) in the form of a spray, dispersible spray, granulate, packet or stick, solution, sprinkling solution, syrup, tablet, capsule, pill or rhombus； or for topical use (medical device composition or pharmaceutical composition) in the form of cream, ointment, ointment, gel, hydrogel, dispersion, emulsion or spread for use as such for skin applications, or for transdermal use even as a band Aid.a presente invenção refere-se a linhagens selecionadas de bactérias láticas para uso no tratamento de infecções causadas por bactérias patogênicas pertencendo à espécie propionibacterium acnes, em particular para uso no tratamento preventivo e/ou curativo de dermatite em geral, dermatite seborreica, rosácea, eczema e acne. em adição, a presente invenção refere-se a uma composição que compreende uma mistura compreendendo ou, alternativamente, consistindo em linhagens selecionadas de bactérias láticas para uso no tratamento de infecções causadas por bactérias patogênicas pertencendo à espécie propionibacterium acnes, em particular para uso no
