Inactivation of Enterobacter sakazakii in infant milk formula by gamma irradiation: Determination of D10-value

T. M. Osaili, R. R. Shaker, A. S. Abu Al-Hasan, M. M. Ayyash, E. M. Martin

Research output: Contribution to journalArticlepeer-review

39 Citations (Scopus)

Abstract

Enterobacter sakazakii is an emerging foodborne pathogen that has caused several cases of meningitis and necrotizing entercolitis in infants and has been associated with infant formulas. Five strains of E. sakazakii were inoculated individually into brain heart infusion broth and rehydrated or dehydrated infant milk formula and exposed to ionizing radiation. E. sakazakii strains in brain heart infusion broth and rehydrated infant milk formula (RIMF) were exposed to irradiation dose of up to 1 kGy while strains in dehydrated infant milk formula (DIMF) were exposed to irradiation dose of up to 9 kGy. The D 10-values were determined by using a linear regression model. Average calculated D10-values ranged from 0.21 to 0.29 kGy, 0.24 to 0.37 kGy, and 1.06 to 1.71 kGy in brain heart infusion broth, RIMF, and DIMF, respectively. The results obtained from this study will be useful for powdered infant milk formula industries to reduce the risk associated with E. sakazakii.

Original languageEnglish
Pages (from-to)M85-M88
JournalJournal of Food Science
Volume72
Issue number3
DOIs
Publication statusPublished - Apr 2007
Externally publishedYes

Keywords

  • D-value
  • Dehydrated infant milk formula
  • E. sakazakii
  • Gamma irradiation
  • Rehydrated infant milk formula

ASJC Scopus subject areas

  • Food Science

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