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Foci of contamination of Listeria monocytogenes in different cheese processing plants

dc.contributor.authorAlmeida, G.
dc.contributor.authorMagalhães, R.
dc.contributor.authorCarneiro, L.
dc.contributor.authorSantos, I.
dc.contributor.authorSilva, J.
dc.contributor.authorFerreira, V.
dc.contributor.authorHogg, T.
dc.contributor.authorTeixeira, P.
dc.date.accessioned2014-05-08T14:45:29Z
dc.date.available2014-05-08T14:45:29Z
dc.date.issued2013
dc.description.abstractListeria monocytogenes is a ubiquitous bacterium widely distributed in the environment that can cause a severe disease in humans when contaminated foods are ingested. Cheese has been implicated in sporadic cases and in outbreaks of listeriosis worldwide. Environmental contamination, in several occasions by persistent strains, has been considered an important source of finished product contamination. The objectives of this research were to (i) evaluate the presence of L monocytogenes within the factory environments and cheeses of three processing plants, artisanal producer of raw ewe's milk cheeses (APC), small-scale industrial cheese producer (SSI) and industrial cheese producer (ICP) each producing a distinct style of cheese, all with history of contamination by L monocytogenes (ii) and identify possible sources of contamination using different typing methods (arsenic and cadmium susceptibility, geno-serotyping, PFGE). The presence of markers specific for 3 epidemic clones (ECI-ECIII) of L monocytogenes was also investigated: Samples were collected from raw milk (n = 179), whey (n = 3), cheese brining solution (n = 7), cheese brine sludge (n = 505), finished product (n = 3016), and environment (n = 2560) during, at least, a four-year period. Listeria monocytogenes was detected in environmental, raw milk and cheese samples, respectively, at 15.4%, 1.1% and 13.6% in APC; at 8.9%, 2.9% and 3.4% in SSI; and at 0%, 21.1% and 0.2% in ICP. Typing of isolates revealed that raw ewe's milk and the dairy plant environment are important sources of contamination, and that some strains persisted for at least four years in the environment. Although cheeses produced in the three plants investigated were never associated with any case or outbreak of listeriosis, some L monocytogenes belonging to specific PFGE types that caused disease (including putative epidemic clone strains isolated from final products) were found in this study.por
dc.description.versioninfo:eu-repo/semantics/publishedVersion
dc.identifier.citationALMEIDA, Gonçalo ...[et al.] - Foci of contamination of Listeria monocytogenes in different cheese processing plants. International Journal of Food Microbiology. ISSN 0168-1605. Vol. 167 (2013), p. 303–309por
dc.identifier.doi10.1016/j.ijfoodmicro.2013.09.006
dc.identifier.eissn1879-3460
dc.identifier.issn0168-1605
dc.identifier.urihttp://hdl.handle.net/10400.14/14334
dc.identifier.wosWOS:000327829300002
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherElsevierpor
dc.relationPEst-OE/EQB/IA0016/2011
dc.relationISOLATION, CHARACTERIZATION, VIRULENCE FACTORS AND ANTIBIOTIC RESISTANCE AMONG CAMPYLOBACTER SPP. ISOLATED FROM FOOD AND CLINICAL CASES
dc.relationCHARACTERISTICS OF SPECIFIC STRAINS OF LISTERIA MONOCYTOGENES POTENTIATING PERSISTENCE IN FOOD AND FOOD PROCESSING ENVIRONMENTS AND RELEVANCE TO FOOD SAFETY
dc.subjectListeria monocytogenespor
dc.subjectCheesepor
dc.subjectSources of contaminationpor
dc.subjectTypingpor
dc.subjectPFGEpor
dc.subjectPersistencepor
dc.titleFoci of contamination of Listeria monocytogenes in different cheese processing plantspor
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleISOLATION, CHARACTERIZATION, VIRULENCE FACTORS AND ANTIBIOTIC RESISTANCE AMONG CAMPYLOBACTER SPP. ISOLATED FROM FOOD AND CLINICAL CASES
oaire.awardTitleCHARACTERISTICS OF SPECIFIC STRAINS OF LISTERIA MONOCYTOGENES POTENTIATING PERSISTENCE IN FOOD AND FOOD PROCESSING ENVIRONMENTS AND RELEVANCE TO FOOD SAFETY
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FAGR-ALI%2F64662%2F2006/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBPD%2F35392%2F2007/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/SFRH/SFRH%2FBPD%2F72617%2F2010/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBD%2F71704%2F2010/PT
oaire.citation.endPage309
oaire.citation.issue3
oaire.citation.startPage303
oaire.citation.titleInternational Journal of Food Microbiology
oaire.citation.volume167
oaire.fundingStream3599-PPCDT
oaire.fundingStreamSFRH
person.familyNameAlmeida
person.familyNameMagalhães
person.familyNameSilva
person.familyNameBorges Ferreira
person.familyNameHogg
person.familyNameTeixeira
person.givenNameGonçalo
person.givenNameRui
person.givenNameJoana
person.givenNameVânia
person.givenNameTim
person.givenNamePaula
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project.funder.nameFundação para a Ciência e a Tecnologia
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project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsrestrictedAccesspor
rcaap.typearticlepor
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