An Kyung-A, Jo Yunhee, Arshad Muhammad Sajid, Kim Gui-Ran, Jo Cheorun, Kwon Joong-Ho
School of Food Science and Biotechnology, Kyungpook National University, Daegu 41566, Korea.
Hazardous Substances Analysis Division, Daegu Regional Food and Drug Administration, Daegu 42612, Korea.
Korean J Food Sci Anim Resour. 2017;37(2):297-304. doi: 10.5851/kosfa.2017.37.2.297. Epub 2017 Apr 30.
Animal-origin food products pose serious threat to public food safety due to high microbial loads. The microbial and radioactive contaminations in commercial cold duck meat products were evaluated. Ten different lots of commercial samples (C-C) were classified based on type and smoking process. All samples were highly contaminated (< 4-7 Log CFU/g) with total aerobic bacteria (TAB), yeasts and molds (Y&M), and 7 samples (C-C) were positive for coliforms. Furthermore, three samples were contaminated with (C-C) and one with (C). No radionuclides (I, Cs, and Cs) were detected in any sample. The results of DEFT (direct epifluorescent filter technique)/APC (aerobic plate count), employed to screen pre-pasteurization treatments of products, indicated that smoked samples were positive showing DEFT/APC ratios higher than 4. Notably, the samples showed a serious threat to microbial safety, thus were irradiated with electron-beam (e-beam). The D values for and were 0.65 and 0.42 kGy, respectively. E-beam application at 3 and 7 kGy resulted in reduction of initial TAB, Y&M, and coliform populations by 3 and 6 log cycles, respectively. Thus, e-beam was proven to be a good decontamination approach to improve the hygiene of cold duck meat.
由于微生物负荷高，动物源性食品对公共食品安全构成严重威胁。对市售冷鸭肉产品中的微生物和放射性污染进行了评估。根据类型和烟熏工艺对10个不同批次的商业样品（C-C）进行了分类。所有样品的需氧菌总数（TAB）、酵母菌和霉菌（Y&M）均受到高度污染（<4-7 Log CFU/g），7个样品（C-C）的大肠菌群呈阳性。此外，3个样品受到（C-C）污染，1个样品受到（C）污染。在任何样品中均未检测到放射性核素（I、Cs和Cs）。用于筛选产品巴氏杀菌前处理的直接表面荧光过滤技术（DEFT）/需氧平板计数（APC）结果表明，烟熏样品呈阳性，DEFT/APC比值高于4。值得注意的是，这些样品对微生物安全构成严重威胁，因此用电子束（e-beam）进行辐照。和的D值分别为0.65和0.42 kGy。3 kGy和7 kGy的电子束照射分别使初始TAB、Y&M和大肠菌群数量减少3个和6个对数周期。因此，电子束被证明是一种改善冷鸭肉卫生状况的良好去污方法。
