title: Double-blind study of suppression of indoor fungi and bacteria by the PuriDyne biogenic air purifier.
abstract: The PuriDyne Air Purification System was studied in a double-blind trial for its ability to reduce the prevalence of bacteria and fungi in residential units. Twelve apartments were studied employing an Andersen Sampler for airborne fungi and Rodac plates for surface bacteria. Following determination of baseline levels, PuriDyne units with active filters were installed in six apartments, and units with inactive filters in six others. Sampling continued weekly for 1 month while the Air Purifiers were in place and at the end of 2 weeks following their removal. There was no statistically significant difference in airborne fungal or surface bacterial levels between baseline and treatment periods for apartments with either active or inactive units, nor were there significant differences between the two groups at any time.
authors.affiliation: Department of Medicine, National Jewish Center for Immunology and Respiratory Medicine, Denver, Colorado.
authors.forename: H S
authors.initials: HS
authors.lastname: Nelson
authors.forename: R M
authors.initials: RM
authors.lastname: Skufca
mesh_terms: D000393:Air Pollutants / Q000302:isolation & purification*; D001419:Bacteria / Q000302:isolation & purification*; D004311:Double-Blind Method; D005658:Fungi / Q000302:isolation & purification*; D006798:Housing; D006801:Humans; D015995:Prevalence; D012134:Respiratory Protective Devices / Q000592:standards*; D013997:Time Factors
chemical_list: D000393:Air Pollutants