Fuente: WIPO "tomato" The present invention relates to a composition for maintaining the viability of a microorganism, said composition comprising: at least one polysaccharide, at least one polyol, and at least one organic medium, said organic medium comprising i) at least one source of nutrients, ii) calcium chloride CaCl2 and iii) ferric chloride FeCl3, wherein the microorganism is a bacteria.