Antibacterial composition containing an isomer mixture of monosaccharide alkyl monoacetals or monoethers

A method for disinfection or prevention of bacterial colonization by Gram-positive bacteria of a substrate, comprising:

• putting a substrate into contact with a composition comprising a mixture of positional isomers of alkyl monoethers or monoacetals of monosaccharides or monosaccharide alkylglycosides or pharmaceutically acceptable salts thereof, said alkyl group comprising between 11 to 18 carbon atoms, and said alkyl monoethers or monoacetals presenting an ether alkyl or acetal alkyl group on two distinct positions of the monosaccharide or monosaccharide alkylglycoside.