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http://dx.doi.org/10.13103/JFHS.2015.30.2.178

Microbiological Quality and Growth and Survival of Foodborne Pathogens in Ready-To-Eat Egg Products  

Jo, Hye Jin (Department of Food and Nutrition, Kyung Hee University)
Choi, Beom Geun (Department of Food and Nutrition, Kyung Hee University)
Wu, Yan (Department of Food and Nutrition, Kyung Hee University)
Moon, Jin San (Veterinary Pharmaceutical Management, Animal and Plant Quarantine Agency)
Kim, Young Jo (Regulatroy Reform & Legal Affairs Office, Ministry of Food and Drug Safety)
Yoon, Ki Sun (Department of Food and Nutrition, Kyung Hee University)
Publication Information
Journal of Food Hygiene and Safety / v.30, no.2, 2015 , pp. 178-188 More about this Journal
Abstract
Microbial quality of baked egg products was evaluated by counting the levels of sanitary indicative bacteria (aerobic plate counts, coliforms, and E. coli), L. monocytogenes and Salmonella spp. at the critical control points (CCPs) of manufacturing process. In addition, the survival and growth of foodborne pathogens in various egg products (cheese, tuna, tteokgalbi, pizza omelets, baked egg, and steamed egg) were investigated at 4, 10, and $15^{\circ}C$. The contamination level of aerobic plate counts decreased from 4.67 log CFU/g at CCP 1 to 0.56 log CFU/g at CCP 3 in baked egg products. No coliforms and E. coli were detected at all CCPs. Although L. innocua and Salmonella spp. were identified at CCP 1, no L. monocytogenes and Salmonella spp. were detected in the final products. The contamination levels of aerobic plate counts and coliforms in egg strips and number of aerobic plate counts in Tteokgalbi omelet are higher than the microbiological standard of processed egg products. At $10^{\circ}C$, the growth of all pathogens was not prevented in omelet and baked egg, but the populations of S. Typhimurium and E. coli were reduced in steamed egg at $10^{\circ}C$, regardless of the presence of other pathogens. The growth of L. monocytogenes was faster than that of S. Typhimurium and E. coli in omelet. More rapid growth of S. Enteritidis than S. Typhimurium was observed in egg products, indicating the greater risk of S. Enteritidis than S. Typhimurium in egg products.
Keywords
Processed egg products; Microbial quality; Sanitary indicative bacteria; S. Enteritidis; S. Typhimurium;
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