FACTORS AFFECTING THE VIABILITY OF AIR-BORNE BACTERIA: I. BACTERIA AEROSOLIZED FROM DISTILLED WATER
- 1 December 1959
- journal article
- research article
- Published by Canadian Science Publishing in Canadian Journal of Microbiology
- Vol. 5 (6), 649-669
- https://doi.org/10.1139/m59-079
Abstract
The death of bacterial cells aerosolized from distilled water suspensions has been studied over a 5-hour period. It was found that death occurred in two stages, a rapid initial kill taking place within the first second and a subsequent slower death. First-order kinetics only applied to this secondary death at low relative humidity ranges, and this is taken to indicate that at least two reactions are responsible for viable decay. The death rates of the air-borne cells have been correlated with a mathematical function of both temperature and humidity. Activation energies associated with aerosol death have been found to increase from 4000 cal/mole to 12,000 cal/mole as the cells age in air. It is suggested that the death of the cell results from the movement of water molecules in and out of the cell, in an equilibrium system, resulting in a collapse of the natural structure of cellular protein.Keywords
This publication has 19 references indexed in Scilit:
- The Effect of Sudden Chilling on Escherichia coliJournal of General Microbiology, 1958
- Airborne micro-organisms: a technique for studying their survivalEpidemiology and Infection, 1958
- Thermal inactivation of bacterial virusesArchives of Biochemistry and Biophysics, 1951
- THE STREPTOCOCCUS LACTIS HOST-VIRUS SYSTEM IJournal of Bacteriology, 1949
- Air-Borne InfectionScience, 1943
- Experimental Air-Borne Influenza Infection. I. Influence of Humidity on Survival of Virus in Air.Experimental Biology and Medicine, 1943
- The Effect of Humidity on Beta Streptococci (Group C) Atomized into AirScience, 1942
- The Denaturation of Proteins and its Apparent Reversal. III.The Journal of Physical Chemistry, 1942