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Survival of Escherichia coli O157:H7, Listeria monocytogenes, and Salmonella in Juice Concentrates

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Abstract:

The survival of Escherichia coli O157:H7, Listeria monocytogenes, and Salmonella was studied in apple, orange, pineapple, and white grape juice concentrates and banana puree. Pouches of juice concentrate or puree were inoculated with pathogens at a level ≥103 CFU/g and stored at-23°C (-10°F). Pathogen survival was monitored at 6 and 24 h, once a week for four consecutive weeks, and biweekly thereafter until 12 weeks. When pathogens were not detectable by direct plating, samples were enriched in universal preenrichment broth for 72 h and plated on selective media. Results showed that E. coli O157:H7, L. monocytogenes, and Salmonella were recoverable from all five concentrates through 12 weeks of storage at -23°C.

Keywords:

Document Type: Research Article

Affiliations: 1: Neogen Corporation, 620 Lesher Place, Lansing, Michigan, USA 2: National Food Processors Association, 1350 I Street N.W., Suite 300, Washington, D.C. 20005, USA and Department of Microbiology, Biologic Sciences Institute, University of Minas Gerais, Belo Horizonte, Brazil 3: National Food Processors Association, 1350 I Street N.W., Suite 300, Washington, D.C. 20005, USA

Publication date: 2003-09-01

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