Increased heat resistance of Geobacillus stearothermophilus spores heat-shocked during sporulation

Sang Wook Lee, Sang Jun Sim

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


The purpose of this study was to measure the heat resistance and core mineral content of Geobacillus stearothermophilus ATCC 7953 spores when the sporulating cells were exposed to heat shock at different times during sporulation. Heat shock during sporulation was found to increase the heat resistance of the spores produced subsequently. The spores heat shocked 2 h after the end of the exponential phase showed the highest heat resistance and a 30-fold increase in the d10 compared with the non-heat-shocked spores. The enhanced heat resistance was likely due to the increased mineral content observed in the spores heat shocked at t7 or t8.

Original languageEnglish
Pages (from-to)633-636
Number of pages4
JournalJournal of microbiology and biotechnology
Issue number4
Publication statusPublished - 2006 Apr
Externally publishedYes


  • Geobacillus stearothermophilus
  • Heat resistance
  • Heat shock
  • Sporulation

ASJC Scopus subject areas

  • Biotechnology
  • Applied Microbiology and Biotechnology


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