在不同温度下形成的蜡样芽孢杆菌芽孢的热失活
Thermal inactivation of Bacillus cereus spores formed at different temperatures.
作者信息
González I, López M, Martínez S, Bernardo A, González J
机构信息
Dpto de Higiene y Tecnología de los Alimentos, Facultad de Veterinaria, Universidad de León, Spain.
出版信息
Int J Food Microbiol. 1999 Oct 1;51(1):81-4. doi: 10.1016/s0168-1605(99)00109-9.
The effects of the sporulation temperature in the range 20-45 degrees C on the D and z values of three isolates of Bacillus cereus (ATCC 4342, 7004 and 9818) were investigated. The strains were found to differ in their response. Higher D100 values (around 10-fold) were obtained with isolates 4342 and 9818 when the sporulation temperature increased from 20 to 45 degrees C. With isolate 7004 (the least heat resistant of the three strains), however, the most thermal tolerant spores were obtained at 35 degrees C. The z values were not significantly modified (P > 0.05) by the sporulation temperature. Mean z values of 7.46+/-0.22 degrees C for isolate 4342, 7.80+/-0.40 degrees C for 7004 and 8.09+/-0.33 degrees C for 9818 were obtained.
研究了20至45摄氏度范围内的芽孢形成温度对蜡样芽孢杆菌三株分离株（ATCC 4342、7004和9818）的D值和z值的影响。发现这些菌株的反应有所不同。当芽孢形成温度从20摄氏度升高到45摄氏度时，分离株4342和9818的D100值更高（约10倍）。然而，对于分离株7004（三株菌株中耐热性最低的），在35摄氏度时获得了最耐热的孢子。芽孢形成温度对z值没有显著影响（P>0.05）。分离株4342的平均z值为7.46±0.22摄氏度，7004为7.80±0.40摄氏度，9818为8.09±0.33摄氏度。
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