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Enterococcus faecalis and Pseudomonas aeruginosa behaviour in frozen watercress (Nasturtium officinale) submitted to temperature abuses

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dc.contributor.authorOliveira, S. R.
dc.contributor.authorCruz, R. M. S.
dc.contributor.authorVieira, M. M. C.
dc.contributor.authorSilva, C. L. M.
dc.contributor.authorGaspar, M. N.
dc.date.accessioned2015-12-07T11:04:36Z
dc.date.available2015-12-07T11:04:36Z
dc.date.issued2009
dc.description.abstractWatercress is an herb traditionally consumed fresh. If frozen, would be readily available to consumers. However, pathogenics resistant to frozen storage are a safety concern in this new product. in this study watercress was artificially contaminated with Pseudomonas aeruginosa ATCC 27853 and Enterococcus faecalis ATCC 29212. Their survival was evaluated after blanching, frozen storage and temperature fluctuations of the frozen product. The blanching caused a reduction of about 2 log cfu per gram of product of total viable count (TVC) and about 1.7 and 1.3 log cfu per gram of product of P. aeruginosa and E. faecalis, respectively. P. aeruginosa seemed to be more sensitive to temperature abuses than E. faecalis. After 3 months, TVC was still observed with a reduction of about 3 log cfu per gram of product. At the end of the study, exposure to freeze-thaw cycles resulted in death or injury of the microorganisms. These findings on the behaviour of two microorganisms of concern in frozen watercress will help improving the safety and cold chain settings for this product. (C) 2008 Elsevier Ltd and IIR. All rights reserved.
dc.identifier.doihttps://dx.doi.org/10.1016/j.ijrefrig.2008.08.002
dc.identifier.issn0140-7007
dc.identifier.otherAUT: MVI00201; RMC02331;
dc.identifier.urihttp://hdl.handle.net/10400.1/7313
dc.language.isoeng
dc.peerreviewedyes
dc.publisherElsevier
dc.relation.isbasedonP-003-KDR
dc.titleEnterococcus faecalis and Pseudomonas aeruginosa behaviour in frozen watercress (Nasturtium officinale) submitted to temperature abuses
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage477
oaire.citation.startPage472
oaire.citation.titleInternational Journal of Refrigeration- Revue Internationale du Froid
oaire.citation.volume32
person.familyNameVieira
person.givenNameMargarida
person.identifier.ciencia-id3314-4EFC-1E4A
person.identifier.orcid0000-0003-2774-706X
person.identifier.ridE-1805-2012
person.identifier.scopus-author-id7202140775
rcaap.rightsrestrictedAccess
rcaap.typearticle
relation.isAuthorOfPublication338c2b9c-fbe6-4fc1-af2d-8152a6560119
relation.isAuthorOfPublication.latestForDiscovery338c2b9c-fbe6-4fc1-af2d-8152a6560119

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