Acetobacter acidum-mucosum Tosic & Walker, n.sp., an Organism Forming a Starch-like Polysaccharide

SUMMARY: A new species of Acetobacter, A. acidum-mucosum, isolated from a sample of brewery yeast is proposed. In a malt extract medium at pH 4·5 or lower it forms large capsules and a voluminous viscid sediment, whereas at pH values above 4·9 the capsules are smaller and the deposit is powdery. Its ability to form a starch-like polysaccharide is a characteristic which has not been noted in the case of any other species of Acetobacter.