Movement of Cryptosporidium parvum Oocysts through Soils without Preferential Pathways: Exploratory Test
نویسندگان
چکیده
1 Laboratory of Hydrogeoscience and Biological Engineering, L.G. Rich Environmental Laboratory, Department of Environmental Engineering and Earth Sciences, Clemson University, Anderson, SC, United States, 2 State Key Laboratory of Hydroscience and Engineering, Department of Hydraulic Engineering, Tsinghua University, Beijing, China, 3 Department of Agricultural Engineering, Gyeongsang National University, Jinju, South Korea, 4 Department of Plants, Soils and Climate, Utah State University, Logan, UT, United States, 5 Laboratory of Soil and Water Engineering, Department of Civil and Environmental Engineering, Rensselaer Polytechnic Institute, Troy, NY, United States, 6 Unité ECOSYS, AgroParisTech, Université Paris-Saclay, Thiverval-Grignon, France
منابع مشابه
Preferential Flow and Transport of Cryptosporidium parvum Oocysts through the Vadose Zone: Experiments and Modeling
in the form of 4to 6m-long ovoid-shaped oocysts, with a double wall that is resistant to most oxidation As a result of Cryptosporidium parvum in drinking water, several processes such as ozonation and chlorination (Current, outbreaks of cryptosporidiosis have occurred in the last 10 yr. Al1986; Atwill et al., 1997). though it is generally believed that movement of pathogens through the soil is ...
متن کاملTransport, fate, and infectivity of Cryptosporidium parvum oocysts released from manure and leached through macroporous soil
A major mode of transmission of Cryptosporidium parvum, a widespread waterborne pathogen, is via contaminated drinking and recreational waters. Oocyst transport to surface water can occur by deposition of manure directly in the water or by wash off in surface runoff. Oocyst transport to groundwater is less straightforward and requires that the oocysts move through soil and bedrock to reach the ...
متن کاملPreferential transport of Cryptosporidium parvum oocysts in variably saturated subsurface environments.
When oocysts of the protozoan Cryptosporidium parvum contaminate drinking water supplies, they can cause outbreaks of Cryptosporidiosis, a common waterborne disease. Of the different pathways by which oocysts can wind up in drinking water, one has received little attention to date; that is, because soils are often considered to be perfect filters, the transport of oocysts through the subsoil to...
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Transport of Cryptosporidium parvum through macroporous soils is poorly understood yet critical for assessing the risk of groundwater contamination. We developed a conceptual model of the physics of flow and transport in packed, tilted, and vegetated soilboxes during and immediately after a simulated rainfall event and applied it to 54 experiments implemented with different soils, slopes, and r...
متن کاملMethod detection limits of PCR and immunofluorescence assay for Cryptosporidium parvum in soil.
We determined and compared the method detection limits (MDLalpha) of a PCR and an immunofluorescence assay (IFA) for detection of Cryptosporidium parvum oocysts in soils. Based on the MDLalpha and the quantitative nature and stability of the IFA, PCR analysis is not a useful screening step for soil studies of oocyst transport.
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