Investigation of increased listeriosis revealed two fishery production plants with persistent Listeria contamination in Finland in 2010

In 2010, a marked increase in listeriosis incidence was observed in Finland. Listeria monocytogenes PFGE profile 96 was responsible for one-fifth of the reported cases and a cluster of PFGE profile 62 was also detected. Investigations revealed two fishery production plants with persistent Listeria c...

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Bibliographic Details
Published in:Epidemiology and infection 2014-11, Vol.142 (11), p.2261-2269
Main Authors: NAKARI, U.-M., RANTALA, L., PIHLAJASAARI, A., TOIKKANEN, S., JOHANSSON, T., HELLSTEN, C., RAULO, S. M., KUUSI, M., SIITONEN, A., RIMHANEN-FINNE, R.
Format: Article
Language:English
Subjects:
Animals
Bacteriology
Biological and medical sciences
Disease Outbreaks
Epidemics
Fatalities
Female
Finland - epidemiology
Fisheries
Food
Food Contamination - prevention & control
Food Contamination - statistics & numerical data
Food Microbiology
Food safety
Food-Processing Industry
Fundamental and applied biological sciences. Psychology
Gastrointestinal Infection
Health surveillance
Hematology
Humans
Incidence
Infections
Infectious diseases
Laboratories
Listeria
Listeria - classification
Listeria - pathogenicity
Listeria monocytogenes
Listeriosis - diagnosis
Listeriosis - epidemiology
Male
Microbiology
Miscellaneous
Original Papers
Patients
Questionnaires
Registries
Risk Assessment
Software
Zoonoses
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Summary:In 2010, a marked increase in listeriosis incidence was observed in Finland. Listeria monocytogenes PFGE profile 96 was responsible for one-fifth of the reported cases and a cluster of PFGE profile 62 was also detected. Investigations revealed two fishery production plants with persistent Listeria contamination. It appears likely that the plants were at least partly responsible for the increase of listeriosis. Epidemiological investigation revealed that 57% (31/54) of cases with underlying immunosuppressive condition or medication reported eating gravad or cold-smoked fish. Two public notices were issued by THL and Evira informing which groups were most at risk from the effects of listeriosis and should therefore be cautious in consuming certain products. Systematic sampling of foods and adequate epidemiological investigation methods are required to identify the sources of Listeria infections. Continuous control measures at fishery production plants producing risk products are essential.
ISSN:0950-2688
1469-4409
DOI:10.1017/S095026881300349X