OxyFile #180

UI  - 94113696
AU  - Finch GR
AU  - Black EK
AU  - Labatiuk CW
AU  - Gyurek L
AU  - Belosevic M
TI  - Comparison of Giardia lamblia and Giardia muris cyst inactivation
      by ozone.
AD  - Department of Civil Engineering, University of Alberta, Edmonton,
AB  - Inactivation of Giardia lamblia and Giardia muris cysts was
      compared by using an ozone demand-free 0.05 M phosphate buffer in
      bench-scale batch reactors at 22 degrees C. Ozone was added to
      each trial from a concentrated stock solution for contact times
      of 2 and 5 min. The viability of the control and treated cysts
      was evaluated by using the C3H/HeN mouse and Mongolian gerbil
      models for G. muris and G. lamblia, respectively. The resistance
      of G. lamblia to ozone was not significantly different from that
      of G. muris under the study conditions, contrary to previously
      reported data that suggested G. lamblia was significantly more
      sensitive to ozone than G. muris was. The simple Ct value for 2
      log unit inactivation of G. lamblia was 2.4 times higher than the
      Ct value recommended by the Surface Water Treatment Rule.
LA  - Eng
SO  - Appl Environ Microbiol 1993 Nov;59(11):3674-80