Comparison on inactivation of Enterobacter sakazakii, Salmonella typhimurium, and Bacillus cereus inoculated on infant formula during storage by gamma irradiation

You Young Jin, Ju Ku Kyung, Jiyong Park, Jonghyun Park, Myongsoo Chung, Kisung Kwon, Kyungsook Chung, Misun Won, Bin Song Kyung

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Enterobacter sakazakii, Salmonella typhimurium, and Bacillus cereus were evaluated on inoculated infant formula by gamma irradiation treatment as a method to provide microbial safety. The infant formula inoculated with the major pathogenic bacteria was treated at irradiation dose of 0, 3, 5, and 10 kGy, respectively. After treatment, the samples were individually packaged and stored at 20°C. Microbiological data during storage represented that the populations of E. sakazakii, S. typhimurium, and B. cereus were reduced with the increase of irradiation dose by 4 to 5 log reductions. In particular, E. sakazakii, S. typhimurium, and B. cereus were eliminated at 10, 5, and 3 kGy, respectively. E. sakazakii was the most radiation-resistant, while B. cereus was the least. Our results represent that gamma irradiation below 10 kGy should eliminate the growth of the major pathogenic bacteria in infant formula during storage.

Original languageEnglish
Pages (from-to)861-864
Number of pages4
JournalFood Science and Biotechnology
Volume17
Issue number4
Publication statusPublished - 2008 Nov 24

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Food Science
  • Applied Microbiology and Biotechnology

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