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Ecology and Taxonomy

Aerosol Survival of Pasteurella tularensis and the Influence of Relative Humidity

C. S. Cox, L. J. Goldberg
C. S. Cox
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L. J. Goldberg
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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.

FOOTNOTES

  • ↵1 Present address: Microbiological Research Establishment, Porton Down, Near Salisbury, Wilts, England.

  • Copyright © 1972 American Society for Microbiology
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Aerosol Survival of Pasteurella tularensis and the Influence of Relative Humidity
C. S. Cox, L. J. Goldberg
Applied Microbiology Jan 1972, 23 (1) 1-3; DOI:

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Aerosol Survival of Pasteurella tularensis and the Influence of Relative Humidity
C. S. Cox, L. J. Goldberg
Applied Microbiology Jan 1972, 23 (1) 1-3; DOI:
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