Document Detail

Survival of Campylobacter jejuni in different gas mixtures.
MedLine Citation:
PMID:  17233725     Owner:  NLM     Status:  MEDLINE    
Campylobacter jejuni in fresh chilled chicken meat is known to be a major risk factor for human gastrointestinal disease. In the present study, the survival under chilled conditions of different C. jejuni strains exposed to different gas mixtures usually used for gas packaging of food was examined. Bolton broth and fresh, skinless chicken fillets were inoculated with six and four strains, respectively, and exposed to the gas mixtures 70/30% O(2)/CO(2), 70/30% N(2)/CO(2), and 100% N(2) (the latter only investigated in broth) at refrigeration temperature (4-5 degrees C). In broth culture, the strains survived significantly longer when exposed to 100% N(2) and 70/30% N(2)/CO(2) than in the oxygen-containing gas mixture, 70/30% O(2)/CO(2) (P<0.0001). For the two anaerobic gas mixtures, the reductions only reached 0.3-0.8 log(10) CFU mL(-1) within the same period. In the presence of oxygen, the numbers of C. jejuni were reduced by a minimum of 4.6 log(10) CFU mL(-1) over 21 days. When inoculated onto chicken fillets, the C. jejuni strains also died significantly faster in the oxygen-containing gas mixture, 70/30% O(2)/CO(2) (P<0.0001), reaching reductions of 2.0-2.6 log(10) CFU g(-1) after 8 days. In the gas mixture without oxygen (70/30% N(2)/CO(2)), no reductions were observed.
Louise Boysen; Susanne Knøchel; Hanne Rosenquist
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  FEMS microbiology letters     Volume:  266     ISSN:  0378-1097     ISO Abbreviation:  FEMS Microbiol. Lett.     Publication Date:  2007 Jan 
Date Detail:
Created Date:  2007-01-19     Completed Date:  2007-08-03     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7705721     Medline TA:  FEMS Microbiol Lett     Country:  England    
Other Details:
Languages:  eng     Pagination:  152-7     Citation Subset:  IM    
Department of Microbiology and Risk Assessment, Danish Institute for Food and Veterinary Research, Soeborg, Denmark.
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MeSH Terms
Campylobacter jejuni / drug effects*,  growth & development
Carbon Dioxide / pharmacology
Chickens / microbiology
Colony Count, Microbial
Food Microbiology
Gases / pharmacology*
Meat / microbiology*
Microbial Viability / drug effects*
Nitrogen / pharmacology
Oxygen / pharmacology
Reg. No./Substance:
0/Gases; 124-38-9/Carbon Dioxide; 7727-37-9/Nitrogen; 7782-44-7/Oxygen

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