Figure 11.1. Growth of foodborne pathogens in irradiated and nonirradiated beefbologna. Nonirradiated samples include Yersinia enterocolitica (open triangle), Listeriamonocytogenes (closed square), Salmonella spp. (closed circle), Staphylococcus aureus(closed triangle), and Escherichia coli O157:H7 (open circle). Irradiated samples includeSalmonella spp. (closed circle), L. monocytogenes (open square) and S. aureus (opendiamond). Y. enterocolitica and E. coli O157 were not detected in irradiated samples andare not shown. Standard error of the mean (n = 3) is shown as error bars.Irradiation of Ready-To-Eat Meat Products 205bologna, which is expected as the antimicrobials inhibit, but do notprevent, the growth of those pathogens under mild temperature abuse(Sommers et al. 2002; Sommers et al. 2003a). The minimum growth tem-perature for E. coli O157:H7, Salmonella spp., and S. aureus range from7◦Cto10◦C (Juneja et al. 2009; Medvedova et al. 2009; Huang 2010) andwhile they did not grow in the beef bologna, they were able to persistduring the 2-month storage period.
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