title: Efficacy of Selected Respiratory Protective Equipment Challenged with Bacillus subtilis subsp. niger.
abstract: The efficacy of powered air-purifying respirators, surgical masks, dust/mist respirators, and high-efficiency respirators were tested with a biological aerosol under simulated breathing conditions. Protective ability ranged from 67 to 99.95%. The majority of penetration in negative-pressure respirators occurred at the face-mask interface rather than through the filter material.
authors.affiliation: Life Sciences Division (MT-L), U.S. Army Dugway Proving Ground, Dugway, Utah 84022.
authors.forename: B
authors.initials: B
authors.lastname: Johnson
authors.forename: D D
authors.initials: DD
authors.lastname: Martin
authors.forename: I G
authors.initials: IG
authors.lastname: Resnick