Sporicidal activities of various surfactant components against Bacillus subtilis spores

Won Il Cho, Chan Ick Cheigh, Hee Jeong Hwang, Myong Soo Chung

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

The sporicidal activities against Bacillus subtilis spores of surfactant components with hydrophilic and hydrophobic properties that can lead to the denaturation of various proteins comprising the spore structure were investigated. The reduction in spore numbers by each of the surfactant components bornyl acetate, geranyl acetate, pinene, p-cymene, camphene, citral, 2,3-dihydrobenzofuran, polylysine, and thiamine dilaurylsulfate at 1% was estimated at 1 to 2 log CFU/ml. The average hydrophilelipophile balance value of surfactants with sporicidal activity causing a reduction of 1 to 2 log CFU/ml was 9.3, with a range from 6.7 to 15.8, which is similar to the values of various chemical surfactants of 9.6 to 16.7. The results also showed that the surfactants that were hydrophobic were more effective than those that were hydrophilic in killing B. subtilis spores. Furthermore, the sporicidal effect of surfactants like geranyl acetate and γ-terpinene was significantly enhanced in the presence of a germinant, because L-alanine and synergistic cofactors (e.g., K+ ions) trigger cortex hydrolysis in spores.

Original languageEnglish
Pages (from-to)1221-1225
Number of pages5
JournalJournal of Food Protection
Volume78
Issue number6
DOIs
StatePublished - 1 Jun 2015

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