Article Abstract:
A study was conducted to determine the conditions under which Cryptosporidium parvum oocysts associate with suspended sediments and how this interaction influences the sedimentation behavior of oocysts in surface waters. It was found that the ubiquious association of C. parvum oocysts with suspended particles enhances the sedimentation of oocysts in natural waters and that this interaction should generally be considered when predicting the migration of pathogens in the environment.
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Article Abstract:
The capture and retention of Cryptosporidium parvum oocysts in Pseudomonas aeruginosa biofilms are observed using laboratory flow cells. The results demonstrate that biofilm architecture and surface-chemical interactions play a significant role in mediating the deposition of pathogenes from suspension into biofilms and hydrodynamic transport processes cause Cryptosporidium parvum oocysts to migrate from the bulk fluid to surface-attached microbial communities.
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Article Abstract:
The results of laboratory flume experiments designed to investigate the stream-subsurface exchange of Cryptosporidium parvum oocysts is presented. The results indicate that the interactions reduce oocyst concentrations in surface waters and they also concentrate oocysts in sediment beds, which then represent a reservoir for pathogens that could be released during high-flow events.
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