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首页> 外文期刊>Water Science and Technology >Surface and subsurface irrigation with effluents of different qualities and presence of Cryptosporidium oocysts in soil and on crops
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Surface and subsurface irrigation with effluents of different qualities and presence of Cryptosporidium oocysts in soil and on crops

机译：在地面和地下进行不同质量的废水冲洗，并在土壤和农作物中存在隐孢子虫卵囊

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A large variety of human pathogens are excreted in wastewater including bacteria, viruses, protozoan cysts and helminth eggs In raw sewage, human pathogens reach high numbers, thereafter decreasing successively at each treatment step However, the final effluents still contain a large fraction of these pathogens that may pose a serious public health Among the various crops irrigated with effluents, vegetables are the most vulnerable to contamination Vegetables, usually eaten raw (uncooked) or with rich dressings (causing regrowth of some pathogenic bacteria) pose the main threat to humans The importance of microbiological and parasitological criteria for reused water has been repeatedly emphasized Some microbiological recommendations based on epidemiological data have been established for untreated wastewater, there is still a need to define the criteria for effluent quality required for unrestricted crop irrigation This paper presents a field study comparison of two irrigation methods surface and subsurface of field crops (mainly vineyard) and follow-up of Cryptosporidium oocysts in soil at different depths (0 to 90 cm) Oocysts were isolated at all depths without a clear pattern of distribution (0 to 640 oocysts/g) In addition different vegetables irrigated with different effluent qualities were tested for the presence of Cryptosporidium oocysts and Giardia cysts The highest prevalence of oocysts was found on zucchini that has a sticky and hairy outer surface (80 to 10,000 oocysts/0 5 kg). [References: 11]
机译：各种人类病原体会在废水中排泄，包括细菌，病毒，原生动物囊肿和蠕虫卵。在原始污水中，人类病原体数量很高，然后在每个处理步骤中依次减少。但是，最终的废水中仍然含有大量这些病原体可能会严重危害公共卫生的蔬菜在各种污水灌溉作物中，蔬菜最容易受到污染。蔬菜，通常是生食（未经煮熟）或调味料丰富（导致某些病原菌的再生），这对人类构成了主要威胁。重复强调了重复利用水的微生物学和寄生虫学标准某些基于流行病学数据的微生物学建议已针对未经处理的废水建立，仍然有必要确定无限制作物灌溉所需的出水水质标准。两种灌溉方式田间作物的表面和亚表面（主要是葡萄园）以及在不同深度（0至90厘米）的土壤中隐孢子虫卵囊的随访情况在所有深度均分离出卵囊，没有明确的分布模式（0到640卵囊/克）测试了使用不同出水质量灌溉的不同蔬菜中隐孢子虫卵囊和贾第鞭毛虫囊肿的存在。在西葫芦中发现其卵囊患病率最高，其外表面有粘性和毛状（80到10,000个卵囊/ 0 5公斤）。 [参考：11]

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