The present invention relates to selected strains of lactic bacteria for use in the treatment of infections caused by pathogenic bacteria belonging to the species Propionibacterium acnes 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 which comprises a mixture comprising or alternatively consisting of selected strains of lactic bacteria for use in the treatment of infections caused by pathogenic bacteria belonging to the species Propionibacterium acnes in particular for use in the preventive and/or curative treatment of dermatitis in general seborrheic dermatitis rosacea eczema and acne. The composition comprising said mixture of selected strains of lactic bacteria is formulated in a pharmaceutical form for oral use (novel food supplement product or medical device or pharmaceutical composition) in the form of powder dispersible powder granulate packets or stick solution spray solution syrup tablet capsule pill or lozenge or for topical use (composition for medical device or pharmaceutical composition) in the form of cream ointment pomade gel hydrogel dispersion emulsion or spray to be used as such for skin applications or for transdermal use even in the form of a band aid.
