Inhibition of Salmonella typhimurium and Escherichia coli in an infant milk formula by an activated lactoperoxidase system.

A glucose/glucose oxidase activated lactoperoxidase system (LP-S) delayed the onset of exponential growth of Salmonella typhimurium and Escherichia coli in infant formula milk. Addition of urea peroxide with the LP-S reduced the initial population size and prevented growth of S. typhimurium and extended the lag period before the onset of exponential growth of E.coli.