Related Experiment Video
Updated: Aug 14, 2026

06:32
Protective Efficacy and Pulmonary Immune Response Following Subcutaneous and Intranasal BCG Administration in Mice
Published on: September 19, 2016
Efficacy of Selected Respiratory Protective Equipment Challenged with Bacillus subtilis subsp. niger
B Johnson1, D D Martin, I G Resnick
1Life Sciences Division (MT-L), U.S. Army Dugway Proving Ground, Dugway, Utah 84022.
Applied and Environmental Microbiology
|June 1, 1994
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.

