Affiliation:
1. Naval Biomedical Research Laboratory, Naval Supply Center, Oakland, California 94625
Abstract
The aerosol survival in air was determined for
Pasteurella tularensis
live vaccine strain (LVS) as a function of relative humidity (RH). Three different preparations of bacteria were used: (i) liquid suspension of
P. tularensis
LVS in spent culture medium; (ii) powders of
P. tularensis
LVS freeze-dried in spent culture fluid; (iii)
P. tularensis
LVS freeze-dried in spent culture fluid and then reconstituted with distilled water and disseminated as a liquid suspension. Preparation (i) gave greatest survival at high RH and lowest survival at intermediate RH. Preparation (ii), in contrast, gave greatest survival at low RH and minimum survival at 81% RH. Preparation (iii) was the same as preparation (i), i.e., the process of freeze-drying and reconstituting with distilled water before aerosol formation had little or no effect upon aerosol survival as a function of RH. Hence, control of aerosol survival appears to be through the water content of
P. tularensis
LVS at the moment of aerosol generation rather than the water content of the bacteria in the aerosol phase.
Publisher
American Society for Microbiology
Subject
General Pharmacology, Toxicology and Pharmaceutics,General Immunology and Microbiology,General Biochemistry, Genetics and Molecular Biology,General Medicine
Cited by
8 articles.
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