||Increased Infectivity with Exposure to Ozone and Sulfuric Acid.
Gardner, Donald E. ;
Miller, Frederick J. ;
Illing, Joseph W. ;
Kirtz., Jerome M. ;
||Health Effects Research Lab., Research Triangle Park, N.C. Clinical Studies Div.
Sulfuric acid ;
Respiratory diseases ;
Air pollution ;
Air pollution effects(Humans) ;
Synergistic effects of air pollutants
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
The effects of the combined action of ozone (O3) and sulfuric acid (H2SO4) aerosol on host susceptibility to an aerosol of viable microorganisms were studied. Exposure to O3 (0.196 mg/cu m) was for 3 h, while exposure to H2SO4 (0.9 mg/cu m) lasted 2 h. Neither pollutant alone caused a significant increase in mortality as compared to clean air controls. In those studies involving the combined action of the sequential exposure to the two pollutants, there was a statistically significant increase in respiratory infections in the treated group over controls (indicated by per cent mortality) only when the exposure to the oxidant immediately preceded that of the acid. (Copyright (c) Elsevier/North-Holland Biomedical Press 1977.)