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首页> 外文期刊>Journal of Parasitology >Efficacy of using harmless Bacillus endospores to estimate the inactivation of Cryptosporidium parvum oocysts in water.
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Efficacy of using harmless Bacillus endospores to estimate the inactivation of Cryptosporidium parvum oocysts in water.

机译：使用无害芽孢杆菌内生孢子来评估水中隐孢子虫卵囊的灭活效果。

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摘要

The need to use complex in vitro cell culture, expensive equipment, and highly-trained technicians that are available only to specialist laboratories has significantly limited studies assessing the potential of pulsed UV light (PUV) to inactivate the waterborne parasite Cryptosporidium parvum in drinking water. This constitutes the first study to report on the use of different non-pathogenic Bacillus endospores as potential surrogate organisms to indicate the PUV inactivation performance of a C. parvum oocyst suspended in water. Findings showed that PUV effectively inactivated approximately 5 log10 CFU/ml Bacillus megaterium and Bacillus pumilus endospores suspended in water at a UV dose of 9.72 micro J/cm2 that also inactivated statistically similar levels of C. parvum oocysts (P<0.05), as determined by combined in vitro HCT-8 cell culture and quantitative PCR. Specifically, this study demonstrated that B. megaterium exhibited greater or similar PUV-inactivation kinetic data compared to that of similarly treated C. parvum over the UV dose range 6.4 to 12.9 micro J/cm2. Therefore, the former may be used as an indicator organism for safely investigating the PUV-inactivation performance of this chlorine-resistant, waterborne parasite at the waste-water treatment plant level. Findings presented will impact positively on future water quality studies and on public health.
机译：仅需要专业实验室才能使用复杂的体外细胞培养，昂贵的设备和训练有素的技术人员，对评估脉冲紫外线（PUV）灭活饮用水中水生寄生虫小隐孢子虫潜能的潜力的研究非常有限。这是第一个报告使用不同的非致病性芽孢杆菌内生孢子作为潜在替代生物来表明悬浮在水中的小球藻卵囊PUV灭活性能的研究。结果表明，PUV有效灭活了悬浮于水中的约5 log 10 CFU / ml巨大芽孢杆菌和短小芽孢杆菌内生孢子，紫外线剂量为9.72 micro J / cm 2 通过联合体外HCT-8细胞培养和定量PCR测定，小球藻卵囊的统计学水平相似（P <0.05）。具体而言，这项研究表明，在6.4至12.9 micro J / cm 2 的UV剂量范围内，巨大芽孢杆菌与经相似处理的小球藻相比，具有更大或更相似的PUV失活动力学数据。因此，前者可以用作指示生物，以安全地研究该抗氯，水性寄生虫在废水处理厂一级的PUV灭活性能。提出的发现将对未来的水质研究和公共卫生产生积极影响。

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