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Thermal Inactivation of Avian Influenza Virus and Newcastle Disease Virus in a Fat-Free Egg Product

Chmielewski, Revis A., Beck, Joan R., Swayne, David E.
Journal of food protection 2011 v.74 no.7 pp. 1161
Influenza A virus, Newcastle disease virus, avian influenza, biosecurity, chicken eggs, dried eggs, egg shell, eggs, fat-free foods, food safety, heat inactivation, heat tolerance, hens, international trade, liquids, pasteurization, risk reduction, serotypes, virulence, viruses
High-pathogenicity avian influenza (HPAI) virus, low-pathogenicity avian influenza (LPAI) virus, virulent Newcastle disease virus (vNDV) and low-virulent Newcastle disease virus (lNDV) can be present on the eggshell surface, and HPAI viruses and vNDV can be present in the internal contents of chicken eggs laid by infected hens. With the increase in global trade, egg products could present potential biosecurity problems and affect international trade in liquid and dried egg products. Therefore, the generation of survival curves to determine decimal reduction times (DT -values) and change in heat resistance of the viruses (zD-value) within fat-free egg product could provide valuable information for development of risk reduction strategies. Thermal inactivation studies using A/chicken/Pennsylvania/1370/83 (H5N2) HPAI virus resulted in D55-, D56-, D56.7-, D57-, D58-, and D59-values of 18.6, 8.5, 3.6, 2.5, 0.4, and 0.4 min, respectively. The zD-value was 4.4uC. LPAI virus A/chicken/New York/13142/94 (H7N2) had D55-, D56.7-, D57-, D58-, D59-, and D60-values of 2.9, 1.4, 0.8, 0.7, 0.7, and 0.5 min, respectively, and a z-value of 0.4uC. vNDV avian paramyxoviruses of serotype 1 (AMPV-1)/chicken/California/ 212676/2002 had D55-, D56-, D56.7-, D57-, D58-, and D59-values of 12.4, 9.3, 6.2, 5, 3.7, and 1.7 min, respectively. The zD-value was 4.7uC. lNDV AMPV-1/chicken/United States/B1/1948 had D55-, D57-, D58-, D59-, D61-, and D63-values of 5.3, 2.2, 1.1, 0.55, 0.19, and 0.17 min, respectively, and a zD-value of 1.0uC. Use of these data in developing egg pasteurization standards for AI and NDV-infected countries should allow safer trade in liquid egg products.