Sunlight inactivation of Campylobacter jejuni and Salmonella enterica, compared with Escherichia coli, in seawater and river water.
Sunlight inactivation of Campylobacter jejuni and Salmonella enterica, compared with Escherichia coli, in seawater and river water.
复制标题
与大肠杆菌相比，海水和河水中的空肠弯曲杆菌和肠沙门氏菌的阳光灭活情况。
DOI：
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发表时间：
2007
影响因子：
2.3
通讯作者：
Robin R Braithwaite
中科院分区：
文献类型：
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作者：
L. Sinton;C. Hall;Robin R Braithwaite
对室外100个L小室海水和河水进行了空肠弯曲菌和肠炎沙门氏菌灭活试验，并与大肠杆菌进行了比较。这些小室(与黑暗对照配对)被种植了废物稳定塘废水和实验室培养的病原体，并在夏季和冬季实验中暴露在阳光下。所有的日光失活(k(S))率，作为累积的太阳总辐射(日照)的函数，远高于相应的暗(k(D))率，排序(和平均k(S)率分别为：空肠弯曲杆菌(3.23；2.34)、肠杆菌(0.51；0.37)和大肠杆菌(0.34；0.26)。所有T(90)(达到90%失活的时间)冬季均高于夏季，但夏季与冬季S(90)(90%失活所需的日晒)值有更大的相似性。空肠弯曲菌的快速失活归因于对光氧化损伤的高度敏感性。这些结果表明，在阳光照射的水域中，空肠弯曲菌对空肠弯曲菌的影响比肠链球菌更保守，而空肠弯曲菌作为致病菌传播的可能性比肠链球菌小。
The inactivation of Campylobacter jejuni and Salmonella enterica, compared with Escherichia coli, was determined in 100 l chambers of seawater and river water located at an outdoor site. The chambers (paired with dark controls) were seeded with waste stabilization pond effluent and laboratory-cultured pathogens, and exposed to sunlight in summer and winter experiments. All sunlight inactivation (k(S)) rates, as a function of cumulative global solar radiation (insolation), were far higher than the corresponding dark (k(D)) rates, with a ranking (and average k(S) rates for seawater and river water, respectively) of: C. jejuni (3.23; 2.34)>S. enterica (0.51; 0.37)>E. coli (0.34; 0.26). All the T(90) (time to 90% inactivation) values were higher in winter than in summer, but there was far greater similarity between the summer and winter S(90) (insolation needed for 90% inactivation) values. The rapid inactivation of C. jejuni was attributed to a high susceptibility to photooxidative damage. The results suggest that, in sunlight-exposed waters, E. coli will be a more conservative indicator for C. jejuni than for S. enterica, and C. jejuni transmission as a pathogenic agent is less likely than for S. enterica.