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Rapid inactivation of Cronobacter sakazakii on copper alloys following periods of desiccation stress.
MedLine Citation:
PMID:  22805969     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
Cronobacter spp. have been identified as the causative agent in meningitis and necrotizing enterocolitis in premature infants which can be linked to the bacterium's desiccation resistance and persistence in powdered infant formula. In this study we examined the efficacy of copper cast alloys in contact killing of Cronobacter sakazakii following periods of desiccation stress. Cronobacter sakazakii cells suspended in Tryptic Soy Broth (TSB) were killed within 10 min while kept moist on 99.9% copper alloys and within 1 min of drying on 99.9% copper alloys. Survival times were unchanged after cells suspended in TSB were desiccated for 33 days. Cronobacter sakazakii cells suspended in infant formula were killed within 30 min under moist conditions and within 3 min of drying on 99.9% copper alloys. However, when desiccated in infant formula for 45 days, survival times decreased to 10 and 1 min in moist and dry conditions, respectively. In contrast, no decrease in viable cells was noted on stainless steel surfaces under the experimental conditions employed in this study. Cronobacter sakazakii was rapidly killed on copper alloys under all testing conditions of this study indicating that desiccation and copper ion resistance do not prolong survival. These results could have important implications for the utilization of copper in the production and storage of powdered infant formula.
Authors:
Jutta Elguindi; Hend A Alwathnani; Christopher Rensing
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Publication Detail:
Type:  Journal Article     Date:  2011-12-07
Journal Detail:
Title:  World journal of microbiology & biotechnology     Volume:  28     ISSN:  1573-0972     ISO Abbreviation:  World J. Microbiol. Biotechnol.     Publication Date:  2012 Apr 
Date Detail:
Created Date:  2012-07-18     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9012472     Medline TA:  World J Microbiol Biotechnol     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  1837-41     Citation Subset:  IM    
Affiliation:
Department of Soil, Water, and Environmental Science, University of Arizona, Shantz Bldg #38 Rm 429, Tucson, AZ, 85721, USA.
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