Exopolysaccharide for the treatment and/or care of the skin, culture media and compositions

A cosmetic composition for topical or transdermal application comprising a cosmetically effective quantity of the exopolysaccharide produced by a strain of Halomonas anticariensis species with deposit number LMG P-27891 and at least one cosmetically acceptable excipient and/or ingredient, wherein the exopolysaccharide has a composition by weight of 1% to 22% of glucose, 50% to 85% of mannose, 15% to 30% of rhamnose, up to 3% by weight galacturonic acid and up to 4%, by weight xylose, with the condition that the sum of the percentages does not exceed 100%, and wherein the composition:

• is in a formulation selected from the group consisting of creams, multiple emulsions, liquid crystals, anhydrous compositions, foams, gels, cream gels, hydroalcoholic solutions, hydroglycolic solutions, hydrogels, liniments, soaps, shampoos, conditioners, polysaccharide films, ointments, mousses, powders, bars, pencils, sprays, and aerosols;
• and/or
• is incorporated into a cosmetic delivery system and/or sustained release system or is adsorbed on a solid organic polymer or solid mineral support:
• and/or
• comprises liposomes, lipid nanoparticles, surfactant-phospholipid mixed micelles, or water-in-oil microemulsions containing the exopolysaccharide;
• and/or
• is incorporated into fabric, non-woven fabric or a medical device, wherein the medical device is selected from the group consisting of bandages, gauzes, dressings, adhesive patches, non-adhesive patches, occlusive patches, microelectric patches and face masks.