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Appl Environ Microbiol. 1969 November; 18(5): 880-882
Copyright © 1969 American Society for Microbiology. All Rights Reserved.

Stability of St. Louis Encephalitis Virus in the Airborne State

¹ Department of Microbiology and Medical Technology, University of Arizona, Tucson, Arizona 85721

ABSTRACT

The aerosol stability of St. Louis encephalitis (SLE) virus was studied over a 6-hr period at a temperature of 21 C and relative humidity values of 23, 46, 60, and 80%. Aerosols were generated from and collected in 0.75% bovine albumin-buffered saline, and spores of Bacillus subtilis var. niger were used as the tracer to determine the physical decay of the aerosols. Aerosol samples were titrated in BHK-21 cell monolayers for surviving SLE virus. The results of this study indicated that, under the test conditions employed, relative humidity had no influence on the stability of SLE virus in the airborne state.