Evaluation of the protective performance of a positive pressure bio-protective clothing against viral aerosol.
- Author:
Na LI
1
;
Zhan-bo WEN
;
Wen-hui YANG
;
Jie WANG
;
Jin-song LI
;
Ling-fei HU
;
Xiao-kai DONG
;
Ke-yang LIU
;
Jie CAO
Author Information
- Publication Type:Journal Article
- MeSH: Aerosols; Bacteriophage phi X 174; Bioterrorism; prevention & control; Equipment Design; Humidity; Occupational Exposure; prevention & control; Pressure; Protective Clothing; Time Factors; Virus Diseases; prevention & control
- From: Chinese Journal of Preventive Medicine 2012;46(1):67-69
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVETo evaluate the protective performance of a positive pressure bio-protective clothing against viral aerosol.
METHODSThe suspension of indicating virus phage Phi-X174 was made for viral aerosol generating in a hermetic cabin. The diameter of viral aerosol particles were measured with a aerodynamics size analyzer. By adjusting the inner humidity of the cabin, the protective efficiency of the positive pressure bio-protective clothing against viral aerosol in high and low windshield conditions was determined with Andersen six-stage air sampler sampling and plage forming unit (PFU) counting, respectively.
RESULTSThe mass median diameter of Phage Phi-X174 aerosol particles was about 0.922 µm and the background concentration is beyond 2 × 10⁴ particles/m³. The protective efficiency of the clothing against phage Phi-X174 aerosol particles was above 99.9% under different test conditions with the range of viral aerosol concentration between 0 - 23 PFU/m³. Airflow (P = 0.84), environment humidity conditions (P = 0.33) and sampling time (P = 0.07) did not affect the protective efficiency statistically.
CONCLUSIONThe positive pressure bio-protective clothing provided a relatively high efficiency against phage Phi-X174 aerosol regardless of airflow rate, environment humidity and sampling time.
