Survival of Enterobacter sakazakii in a dehydrated powdered infant formula

A quantity of dehydrated powdered infant formula was prepared to contain Enterobacter sakazakii strain 607 at approximately 106 CFU/ml when rehydrated according to the manufacturer's instructions. The survival of the microorganism in the dry formula was followed for 2 years, during which sample...

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Bibliographic Details
Published in:Journal of food protection 2005-09, Vol.68 (9), p.1900-1902
Main Authors: EDELSON-MAMMEL, Sharon G, PORTEOUS, Mary K, BUCHANAN, Robert L
Format: Article
Language:English
Subjects:
Biological and medical sciences
Colony Count, Microbial
Consumer Product Safety
Cronobacter sakazakii - growth & development
Cronobacter sakazakii - isolation & purification
Food industries
Food Microbiology
Fundamental and applied biological sciences. Psychology
Humans
Infant
Infant Food - microbiology
Infant Formula
Infant, Newborn
Time Factors
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Summary:A quantity of dehydrated powdered infant formula was prepared to contain Enterobacter sakazakii strain 607 at approximately 106 CFU/ml when rehydrated according to the manufacturer's instructions. The survival of the microorganism in the dry formula was followed for 2 years, during which samples periodically were rehydrated and analyzed for viable E. sakazakii. During the initial 5 months of storage at room temperature, viable counts declined approximately 2.4 log cycles. During the subsequent 19 months, the concentration of viable E. sakazakii declined an additional 1.0 log cycle. These results indicate that a small percentage of E. sakazakii cells can survive for extended periods in dehydrated powdered infant formula.
ISSN:0362-028X
1944-9097
DOI:10.4315/0362-028x-68.9.1900