Bacillus spores: a review of their properties and inactivation processing technologies

Won Il Cho, Myong Soo Chung

Research output: Contribution to journalReview articlepeer-review

21 Scopus citations

Abstract

Many factors determine the resistance properties of a Bacillus spore to heat, chemical and physical processing, including thick proteinaceous coats, peptidoglycan cortex and low water content, high levels of dipicolinic acid (DPA), and divalent cations in the spore core. Recently, attention has been focused on non-thermal inactivation methods based on high pressure, ultrasonic, high voltage electric fields and cold plasmas for inactivating Bacillus spores associated with deterioration in quality and safety. The important chemical sporicides are glutaraldehyde, chorine-releasing agents, peroxygens, and ethylene oxide. Some food-grade antimicrobial agents exhibit sporostatic and sporicidal activities, such as protamine, polylysine, sodium lactate, essential oils. Surfactants with hydrophilic and hydrophobic properties have been reported to have inactivation activity against spores. The combined treatment of physical and chemical treatment such as heating, UHP (ultra high pressure), PEF (pulsed electric field), UV (ultraviolet), IPL (intense pulsed light) and natural antimicrobial agents can act synergistically and effectively to kill Bacillus spores in the food industry.

Original languageEnglish
Pages (from-to)1447-1461
Number of pages15
JournalFood Science and Biotechnology
Volume29
Issue number11
DOIs
StatePublished - 1 Nov 2020

Keywords

  • Germination
  • Non-thermal inactivation processing
  • Resistance properties
  • Spore formation
  • Sporicidal agents

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