Virus adsorption to mineral surfaces is reduced by microbial overgrowth and organic coatings |
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Authors: | Fuhs G Wolfgang Chen Min Sturman Lawrence S Moore Rebecca S |
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Institution: | (1) New York State Department of Health, Wadsworth Center for Laboratories and Research, Empire State Plaza, 12201 Albany, New York, USA;(2) Present address: North Carolina Department of Agriculture, Rollins Animal Disease Diagnostic Laboratory, Raleigh, North Carolina, USA |
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Abstract: | In experiments with strains of poliovirus, reovirus, echovirus, and Coxsackievirus, overgrowth with exopolymer-forming bacteria reduced virus adsorption to mineral surfaces. Adsorption was improved when organic materials adsorbed to minerals were removed by low-temperature ashing. In a soil series, virus adsorption increased with soil depth. This paralleled a decrease in organic content, but differences in charge development of the soil particles may also be involved. Prolonged (40-year) irrigation with treated sewage effluents, leading to a buildup of organic coatings, also decreased adsorption. However, saturation of the virus-binding capacity of the soil as a result of continuous exposure to virus-containing effluents was not apparent. |
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