English

DTIC AD0762218: Experimental Study of Survival Rate of a Diphtheric Bacillus in Aerosol

A formula was developed for calculating the survival rate in polydisperse aerosols, which excludes the effect of particle sedimentation on the final result; the limits of its application are determined. Significant sensitivity of diphtheric bacillus to the changes in temperature is clarified; at a temperature below zero the causative agent dies very slowly, while at 35 degrees its survival rate is sharply reduced; at 18 degrees the survival rate of a dephtheric bacillus is in the intermediate position. Saliva and broth protect the microorganisms from drying up for a certain period by slowing down the evaporation. This ensures a high survival rate of the diphtheria causative agent for the first 45 min of aerosol existence.

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