Testing of AIRPURE PRODUCT                                For BACTERICIDAL EFFECTS.            1. Experiments performed on May 8-13, 1998.    Broth cultures of four bacterial human pathogens: Staphylococcus aureus [“golden staph”]. Eschericlhai coli [E. coli], Listeria inonocytogenes, Pseudomonas aeruginosa. Were diluted to contain approximately 1*10 bacteria/ml. 5ul of this suspension was spread on the surface of trupticase soy agar [TSA] plates which were then exposed to ozone generated in scaled room of approximately 20 m. ozone was generated using either a Starkeys Products STORM ozone generating unit or a BREEZE ozone generating unit operated in the room for the time periods indicated. Bacteria were exposed on the surface of TSA plates and then the exposed and unexposed plates were incubated overnight at 37 c. Bacterial colonies were counted and expressed as the number of colony forming units [cfu] on the plate surface. The results show that within the limitations of the tests performed, prolonged ozone generation in a closed room by the Starkeys Control Units caused a significant reduction in the number of viable bacteria on moist surfaces within the room. The ozone exposure had a more repid effect on Gram-positive bacteria [Staph. aureus and Listeria] than Gram-negative organisms [E coli and Pseudomanas.] for the organisms tested. It should be noted that these results are based on limited testing, which has not been performed in replicate and must therefore be considered preliminary. To more accurately assess the germicidal function of the ozone generated by these units. Tests need to be repeated with replicate cultures.