Linked Life Data

10419207

Source:http://linkedlifedata.com/resource/pubmed/id/10419207

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
1999-9-21
pubmed:abstractText
To determine the safety of a high moisture bakery product, packaged under modified atmospheres, challenge studies were done on English-style crumpets (water activity [a(w)] 0.990, pH 6.5) inoculated postbaking with Clostridium botulinum types A and proteolytic B spores (5 X 10(2) spores/g). Products were packaged either in air, in air with an Ageless FX200 oxygen absorbent, or in a CO2/N2 (60:40) gas mixture, stored at ambient temperature (25 degrees C), and monitored for toxicity daily. All inoculated crumpets were toxic within 4 to 6 days and were organoleptically acceptable at the time of toxigenesis. Counts of C. botulinum increased to approximately 10(5) CFU/g at the time of toxicity. To determine the effect of baking on product safety, subsequent challenge studies were done on crumpets inoculated with 5 x 10(2) spores/g (baked weight basis) prior to baking. All crumpets were toxic after only 6 days, irrespective of packaging conditions, and toxigenesis again preceded spoilage. Temperature profile studies showed that the maximum internal temperature reached during baking was 97 degrees C, and the total baking process was equivalent to 0.03 min at 121 degrees C. The actual time to toxin production in both studies (4 to 6 days) correlated well with the predicted time (3.4 days) using the U.S. Department of Agriculture Pathogen Modeling Program (version 5.1) for proteolytic strains of C. botulinum. These studies confirm that high moisture bakery products, if contaminated with C. botulinum spores either pre- or postbaking, could pose a public health hazard, if packaged in air (in a high gas barrier package where O2 was depleted and CO2 was generated during storage) or under modified atmosphere packaging conditions and stored at ambient temperature.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Apr
pubmed:issn
0362-028X
pubmed:author
pubmed:issnType
Print
pubmed:volume
62
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
349-55
pubmed:dateRevised
2010-11-18
pubmed:meshHeading
pubmed:year
1999
pubmed:articleTitle
Growth and toxin production by Clostridium botulinum in English-style crumpets packaged under modified atmospheres.
pubmed:affiliation
Department of Food Science and Agricultural Chemistry, McGill University, Ste. Anne de Bellevue, Quebec, Canada.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't