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Effects of suspension in emulsified wiener or incubation in wiener packages, on the virulence of L. monocytogenes Scott A in intragastrically inoculated A/J mice

Citation

Faith, NG and Tamplin, ML and Luchansky, JB and Czuprynski, CJ, Effects of suspension in emulsified wiener or incubation in wiener packages, on the virulence of L. monocytogenes Scott A in intragastrically inoculated A/J mice, Journal of Food Protection, 68, (3) pp. 597-601. ISSN 0362-028X (2005) [Refereed Article]

DOI: doi:10.4315/0362-028X-68.3.597

Abstract

Several outbreaks of listeriosis have been associated with contamination of wieners and other ready-to-eat meat products. In this study, we addressed the question of whether emulsification in, or growth on, wieners triggers a response in the listerial cells that makes them more virulent or protects them against the harsh environment of the gastrointestinal tract in mice. Our results indicate that Listeria monocytogenes Scott A grows poorly, if at all, in one brand of commercially prepared wieners inoculated with 5 103 to 5 106 CFU per package and incubated at 15C. Neither L. monocytogenes Scott A emulsified in a slurry of homogenized wieners nor recovered from wiener package fluid after a 7-day incubation at 15C were more virulent when inoculated into the stomachs of A/J mice than L. monocytogenes Scott A grown in brain heart infusion broth. These findings suggest that the ability of L. monocytogenes Scott A to cause systemic infection following introduction into the gastrointestinal tract was not improved by incubation with wieners or suspension in a meat matrix.

Item Details

Item Type:Refereed Article
Research Division:Biological Sciences
Research Group:Microbiology
Research Field:Bacteriology
Objective Division:Health
Objective Group:Public Health (excl. Specific Population Health)
Objective Field:Food Safety
Author:Tamplin, ML (Professor Mark Tamplin)
ID Code:40865
Year Published:2005
Web of Science® Times Cited:2
Deposited By:Agricultural Science
Deposited On:2006-08-01
Last Modified:2010-06-05
Downloads:0

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