Accession Number : ADA631314


Title :   Challenge of N95 and P100 Filtering Facepiece Respirators with Particles Containing Viable H1N1


Descriptive Note : Final Technical rept. 15 Mar-21 Nov 2009


Corporate Author : APPLIED RESEARCH ASSOCIATES INC PANAMA CITY FL


Personal Author(s) : Wander, Joseph D ; Heimbuch, Brian


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a631314.pdf


Report Date : 02 Dec 2009


Pagination or Media Count : 35


Abstract : 3M1860s (N95) and 3M 8293 (P100) NIOSH-approved filtering facepiece respirators (FFRs) were challenged with aerosolized particles of H1N1 influenza to measure the amount of viable influenza virus that penetrates each device. The test was conducted at the NIOSH-recommended flowrate of 85 LPM using guidance provided by a Department of Defense test standard developed for challenging air purification devices with viable microbial aerosols. The count mode diameter (CMD) particle size of the challenge aerosol was approximate 0.8 microns, which was created by aerosolizing H1N1 influenza virus in an artificial saliva buffer using the Laboratory-Scale Aerosol Tunnel (LSAT). In addition to the H1N1 challenge, each FFR was also challenged with 0.8- microns inert beads. In these tests the N95 FFR (n = 3) removed 99% of the viable H1N1 from the air stream and the P100 (n =3) removed 99.99% of viable H1N1 from the airstream. The percent reductions in mechanical and viable particle counts measured for each FFR using the 0.8- microns bead challenge were equivalent to the percent reduction values measured for like-sized particles containing H1N1, verifying that bioaerosols act as typical particles. These data demonstrate that the N95 and P100 FFR will reduce viable H1N1 aerosol from the airstream at greater than or equal to their rated value.


Descriptors :   *INFLUENZA VIRUS , AEROSOLS , INFECTIOUS DISEASE TRANSMISSION , PROTECTIVE MASK FACEPIECES , PUBLIC HEALTH , RESPIRATORS


Subject Categories : Medicine and Medical Research
      Microbiology
      Protective Equipment


Distribution Statement : APPROVED FOR PUBLIC RELEASE