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Published on: February 13, 2015
Antagonistic Action of Lactobacillus acidophilus Toward Intestinal and Foodborne Pathogens in Associative Cultures 1
1Department of Food Science North Carolina State University, Raleigh, North Carolina 27607.
Abstract:
Lactobacillus acidophilus exerted antagonistic actions on growth of Staphylococcus aureus , Salmonella typhimurium , enteropathogenic Escherichia coli , and Clostridium perfringens when grown with each in associative cultures. S. aureus and C. perfringens were more sensitive to the inhibition than were S. typhimurium and E. coli . The amount of the antagonism produced varied among strains of L. acidophilus and could not be directly related to amounts of acid produced; hydrogen peroxide produced by the lactobacilli appeared to be partially responsible for the antagonistic interaction. The inhibitory effect was produced also under anaerobic conditions in a pre-reduced medium.
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