Mutational improvement of Lactobacillus acidophilus GH 201 intended for ground beef preservation in refrigerator storage

Lactic acid bacteria widely used in food preservation at refrigerator temperatures due to their ability produce high amount of hydrogen peroxide and/or other antibacterial substances at refrigerator temperatures to inhibit food-borne pathogens and psychrophilic spoilage microorganisms. In order to improve of bio-preservation efficacy of Lactobacillus acidophilus GH 201 mutations causing resistance to rifampicin (rif) were used.