An observation about the relative hardiness of bacterial spores and planetary quarantine

Details An observation about the relative hardiness of bacterial spores and planetary quarantine An observation about the relative hardiness of bacterial spores and planetary quarantine

Sep 1973

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1973slsci...4..357t&link_type=abstract

Space Life Sciences, Volume 4, Issue 3-4, pp. 357-367

Computer Science

Scientific paper

Currently, planetary quarantine spacecraft sterilization requirements are based on the ‘logarithmic’ model of bacterial death. This model is a single parameter exponential model in which the sole parameter is the decimal reduction time (D-value). The D-value associated with the sterilization of a population of bacteria is only a relative measure of the rate of bacterial inactivation: It is known to depend upon many factors, but generally these dependencies are not thoroughly understood. The D-values chosen for spacecraft sterilization have been selected conservatively relative to defined experimental procedures and bacterial spore stocks. New data indicate that these D-values are not conservative when compared with those of naturally occurring organisms. The possible implications of these new data for planetary quarantine are analyzed here.

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