Reducing the risk of Escherichia coli O157:H7 contamination of apple by an antagonist used to control postharvest decays of pome fruits.
W. J. Janisiewicz, W. S. Conway and B. Leverentz
Abstracts of presentation at the 1999 Annual Meeting in Montreal, Quebec, August 7–11. Phytopathology (Supplement) Vol. 89, No. 6. 1999. pp. 36.
1999
บทคัดย่อ
Application of the antagonist Pseudomonas syringae to wounded 'Golden Delicious' apple as fresh cells prevented E. coli O157:H7 from becoming established in the wounds. This occurred on apples co-inoculated with the two organisms or inoculated with E. coli O157:H7 one or two days after application of the antagonist. In similar tests, the commercial formulation of the antagonist prevented the establishment of E. coli O157:H7 in wounds when inoculated one or two days after application of the antagonist. In wounds not treated with the antagonist, populations of E. coli O157:H7 increased up to 3 log units during the first 48 hr after inoculation. These results indicate that biocontrol agents developed to control storage decays of fruits may have the additional benefit of preventing the establishment of food-borne pathogens in tissue of wounded and fresh-cut fruits.