Burgos J, Ordóñez JA, Sala F. Effect of ultrasonic waves on the heat resistance of Bacillus cereus and Bacillus licheniformis spores.
Appl Microbiol 1972;
24:497-8. [PMID:
4627969 PMCID:
PMC376546 DOI:
10.1128/am.24.3.497-498.1972]
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Abstract
Heat resistance of Bacillus cereus and Bacillus licheniformis spores in quarter-strength Ringer solution decreases markedly after ultrasonic treatments which are unable to kill a significant proportion of the spore population. This effect does not seem to be caused by a loss of Ca(2+) or dipicolinic acid. The use of ultrasonics to eliminate vegetative cells or to break aggregates in Bacillus spore suspensions to be used subsequently in heat resistance experiments appears to be unadvisable.
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