Cargando…

Epidemiological Survey of Listeria monocytogenes in a gravlax salmon processing line

Listeria monocytogenes is a cause of concern to food industries, mainly for those producing ready-to-eat (RTE) products. This microorganism can survive processing steps such as curing and cold smoking and is capable of growing under refrigeration temperatures. Its presence in RTE fish products with...

Descripción completa

Detalles Bibliográficos
Autores principales: Cruz, C.D., Silvestre, F.A., Kinoshita, E.M., Landgraf, M., Franco, B.D.G.M., Destro, M.T.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Sociedade Brasileira de Microbiologia 2008
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3768386/
https://www.ncbi.nlm.nih.gov/pubmed/24031233
http://dx.doi.org/10.1590/S1517-838220080002000032
_version_ 1782283771358216192
author Cruz, C.D.
Silvestre, F.A.
Kinoshita, E.M.
Landgraf, M.
Franco, B.D.G.M.
Destro, M.T.
author_facet Cruz, C.D.
Silvestre, F.A.
Kinoshita, E.M.
Landgraf, M.
Franco, B.D.G.M.
Destro, M.T.
author_sort Cruz, C.D.
collection PubMed
description Listeria monocytogenes is a cause of concern to food industries, mainly for those producing ready-to-eat (RTE) products. This microorganism can survive processing steps such as curing and cold smoking and is capable of growing under refrigeration temperatures. Its presence in RTE fish products with extended shelf life may be a risk to the susceptible population. One example of such a product is gravlax salmon; a refrigerated fish product not exposed to listericidal processes and was the subject of this study. In order to evaluate the incidence and dissemination of L. monocytogenes 415 samples were collected at different steps of a gravlax salmon processing line in São Paulo state, Brazil. L. monocytogenes was confirmed in salmon samples (41%), food contact surfaces (32%), non-food contact surfaces (43%) and of food handlers’ samples (34%), but could not be detected in any ingredient. 179 L. monocytogenes isolates randomly selected were serogrouped and typed by PFGE. Most of L. monocytogenes strains belonged to serogroup 1 (73%). 61 combined pulsotypes were found and a dendrogram identified six clusters: most of the strains (120) belonged to cluster A. It was suggested that strains arriving into the plant via raw material could establish themselves in the processing environment contaminating the final product. The wide dissemination of L. monocytogenes in this plant indicates that a great effort has to be taken to eliminate the microorganism from these premises, even though it was not observed multiplication of the microorganism in the final product stored at 4°C up to 90 days.
format Online
Article
Text
id pubmed-3768386
institution National Center for Biotechnology Information
language English
publishDate 2008
publisher Sociedade Brasileira de Microbiologia
record_format MEDLINE/PubMed
spelling pubmed-37683862013-09-12 Epidemiological Survey of Listeria monocytogenes in a gravlax salmon processing line Cruz, C.D. Silvestre, F.A. Kinoshita, E.M. Landgraf, M. Franco, B.D.G.M. Destro, M.T. Braz J Microbiol Food Microbiology Listeria monocytogenes is a cause of concern to food industries, mainly for those producing ready-to-eat (RTE) products. This microorganism can survive processing steps such as curing and cold smoking and is capable of growing under refrigeration temperatures. Its presence in RTE fish products with extended shelf life may be a risk to the susceptible population. One example of such a product is gravlax salmon; a refrigerated fish product not exposed to listericidal processes and was the subject of this study. In order to evaluate the incidence and dissemination of L. monocytogenes 415 samples were collected at different steps of a gravlax salmon processing line in São Paulo state, Brazil. L. monocytogenes was confirmed in salmon samples (41%), food contact surfaces (32%), non-food contact surfaces (43%) and of food handlers’ samples (34%), but could not be detected in any ingredient. 179 L. monocytogenes isolates randomly selected were serogrouped and typed by PFGE. Most of L. monocytogenes strains belonged to serogroup 1 (73%). 61 combined pulsotypes were found and a dendrogram identified six clusters: most of the strains (120) belonged to cluster A. It was suggested that strains arriving into the plant via raw material could establish themselves in the processing environment contaminating the final product. The wide dissemination of L. monocytogenes in this plant indicates that a great effort has to be taken to eliminate the microorganism from these premises, even though it was not observed multiplication of the microorganism in the final product stored at 4°C up to 90 days. Sociedade Brasileira de Microbiologia 2008 2008-06-01 /pmc/articles/PMC3768386/ /pubmed/24031233 http://dx.doi.org/10.1590/S1517-838220080002000032 Text en © Sociedade Brasileira de Microbiologia http://creativecommons.org/licenses/by-nc/3.0/ All the content of the journal, except where otherwise noted, is licensed under a Creative Commons License
spellingShingle Food Microbiology
Cruz, C.D.
Silvestre, F.A.
Kinoshita, E.M.
Landgraf, M.
Franco, B.D.G.M.
Destro, M.T.
Epidemiological Survey of Listeria monocytogenes in a gravlax salmon processing line
title Epidemiological Survey of Listeria monocytogenes in a gravlax salmon processing line
title_full Epidemiological Survey of Listeria monocytogenes in a gravlax salmon processing line
title_fullStr Epidemiological Survey of Listeria monocytogenes in a gravlax salmon processing line
title_full_unstemmed Epidemiological Survey of Listeria monocytogenes in a gravlax salmon processing line
title_short Epidemiological Survey of Listeria monocytogenes in a gravlax salmon processing line
title_sort epidemiological survey of listeria monocytogenes in a gravlax salmon processing line
topic Food Microbiology
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3768386/
https://www.ncbi.nlm.nih.gov/pubmed/24031233
http://dx.doi.org/10.1590/S1517-838220080002000032
work_keys_str_mv AT cruzcd epidemiologicalsurveyoflisteriamonocytogenesinagravlaxsalmonprocessingline
AT silvestrefa epidemiologicalsurveyoflisteriamonocytogenesinagravlaxsalmonprocessingline
AT kinoshitaem epidemiologicalsurveyoflisteriamonocytogenesinagravlaxsalmonprocessingline
AT landgrafm epidemiologicalsurveyoflisteriamonocytogenesinagravlaxsalmonprocessingline
AT francobdgm epidemiologicalsurveyoflisteriamonocytogenesinagravlaxsalmonprocessingline
AT destromt epidemiologicalsurveyoflisteriamonocytogenesinagravlaxsalmonprocessingline