Bacteriophage inactivation at the air-water-solid interface in dynamic batch systems

Article Abstract:

The inactivation of the bacteriophages MS2, R17 and phiX174 have been studied through a series of dynamic batch experiments. Results indicate that MS2 and R17 were inhibited when the solutions for each phage were percolated through tubes packed with varying ratios of glass and Teflon beads. The phages were inactivated when they were exposed to destructive forces at the dynamic air-water-solid interface. The phiX174 phage did not undergo inhibition because it did not accumulate at the air-water interfaces or is not influenced by interfacial forces. These findings suggest that viral inactivation is related to virus interaction with the triple-phase boundary in dynamic batch systems.

Physiological aspects, Bacterial growth, Viruses, Virus inhibitors

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VIRTUS, a model of virus transport in unsaturated soils

Article Abstract:

A computer model, VIRTUS, was developed which simultaneously solves equations describing the flow of water, viruses and heat through unsaturated soils under different climatic conditions. Testing the model on three data sets produced good correlation between model predictions and actual values. Model simulations were able to recognize the importance of monitoring temperature- and adsorption dependent virus inactivation rates for accurate model predictions. Considerable testing is required before this model can be used for purposes other than research.

Models, Soil microbiology, Soils, Effect of temperature on

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Role of the air-water-solid interface in bacteriophage sorption experiments

Article Abstract:

A study was conducted to assess the role of the air-water-solid interface (AWI) in virus sorption experiments using the batch equilibrium method. The technique enabled the quantification of sorption of bacteriophages MS2 and X174 to different soils as well as determination of the mode of virus inactivation as a function of the interfacial forces present in the dynamic reactor vessel. Results revealed that forces affiliated with AWI are responsible for inactivation of MS2 in the polypropylene control tubes.

Absorption, Surface chemistry

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