高压均质化对嗜酸嗜热脂肪芽孢杆菌在实验室培养基中存活的影响。
Effects of high-pressure homogenization on the survival of Alicyclobacillus acidoterrestris in a laboratory medium.
作者信息
Bevilacqua A, Cibelli F, Corbo M R, Sinigaglia M
机构信息
Department of Food Science, Faculty of Agricultural Science, Foggia University, Foggia, Italy.
出版信息
Lett Appl Microbiol. 2007 Oct;45(4):382-6. doi: 10.1111/j.1472-765X.2007.02219.x.
AIMS
This study was aimed to investigate the effectiveness of high-pressure homogenization (HPH) against Alicyclobacillus acidoterrestris.
METHODS AND RESULTS
The susceptibility of three different strains of A. acidoterrestris (DSMZ 2498, Gamma4 and c8) to HPH (500-1700 bar) was studied. The experiments were performed in a laboratory medium (malt extract broth) on cells and spores. HPH caused a significant reduction of the initial cell number (1-2 log CFU ml(-1) at the highest pressures) in Gamma4 and DSMZ 2498 strains, whereas the effect on the spores was less significant.
CONCLUSIONS
This study showed that the susceptibility of A. acidoterrestris to HPH was strain-dependent: DSMZ 2498 seemed the most susceptible strain, whereas c8 was the most resistant one.
SIGNIFICANCE AND IMPACT OF THE STUDY
The results of our study will provide useful information on the sensitivity of an emerging spoilage micro-organism, such as A. acidoterrrestris, to HPH.
目的
本研究旨在调查高压均质化（HPH）对嗜酸耐热脂肪芽孢杆菌的有效性。
方法与结果
研究了嗜酸耐热脂肪芽孢杆菌的三种不同菌株（DSMZ 2498、Gamma4和c8）对HPH（500 - 1700巴）的敏感性。实验在实验室培养基（麦芽提取物肉汤）中对细胞和孢子进行。HPH导致Gamma4和DSMZ 2498菌株的初始细胞数量显著减少（在最高压力下为1 - 2个对数CFU ml(-1)），而对孢子的影响较小。
结论
本研究表明嗜酸耐热脂肪芽孢杆菌对HPH的敏感性因菌株而异：DSMZ 2498似乎是最敏感的菌株，而c8是最具抗性的菌株。
研究的意义和影响
我们的研究结果将为一种新兴的腐败微生物，如嗜酸耐热脂肪芽孢杆菌，对HPH的敏感性提供有用信息。
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