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An outbreak of Listeria monocytogenes serotype 3a infections from butter in Finland.

https://arctichealth.org/en/permalink/ahliterature198523
Source
J Infect Dis. 2000 May;181(5):1838-41
Publication Type
Article
Date
May-2000
Author
O. Lyytikäinen
T. Autio
R. Maijala
P. Ruutu
T. Honkanen-Buzalski
M. Miettinen
M. Hatakka
J. Mikkola
V J Anttila
T. Johansson
L. Rantala
T. Aalto
H. Korkeala
A. Siitonen
Author Affiliation
Department of Infectious Disease Epidemiology, National Public Health Institute, FIN-00300 Helsinki, Finland. outi.lyytikainen@ktl. fi.
Source
J Infect Dis. 2000 May;181(5):1838-41
Date
May-2000
Language
English
Publication Type
Article
Keywords
Adolescent
Adult
Aged
Aged, 80 and over
Butter - microbiology
Case-Control Studies
Child
Cross Infection - epidemiology
Dairying
Disease Outbreaks
Female
Finland - epidemiology
Humans
Incidence
Listeria monocytogenes - classification
Listeriosis - epidemiology - etiology - transmission
Male
Middle Aged
Serotyping
Abstract
In February 1999, an outbreak of listeriosis caused by Listeria monocytogenes serotype 3a occurred in Finland. All isolates were identical. The outbreak strain was first isolated in 1997 in dairy butter. This dairy began delivery to a tertiary care hospital (TCH) in June 1998. From June 1998 to April 1999, 25 case patients were identified (20 with sepsis, 4 with meningitis, and 1 with abscess; 6 patients died). Patients with the outbreak strain were more likely to have been admitted to the TCH than were patients with other strains of L. monocytogenes (60% vs. 8%; odds ratio, 17.3; 95% confidence interval, 2.8-136.8). Case patients admitted to the TCH had been hospitalized longer before cultures tested positive than had matched controls (median, 31 vs. 10 days; P=.008). An investigation found the outbreak strain in packaged butter served at the TCH and at the source dairy. Recall of the product ended the outbreak.
PubMed ID
10823797 View in PubMed
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Diversity of Listeria monocytogenes isolates of human and food origin studied by serotyping, automated ribotyping and pulsed-field gel electrophoresis.

https://arctichealth.org/en/permalink/ahliterature179719
Source
Clin Microbiol Infect. 2004 Jun;10(6):562-8
Publication Type
Article
Date
Jun-2004
Author
S. Lukinmaa
K. Aarnisalo
M-L Suihko
A. Siitonen
Author Affiliation
Laboratory of Enteric Pathogens, National Public Health Institute, Helsinki, Finland.
Source
Clin Microbiol Infect. 2004 Jun;10(6):562-8
Date
Jun-2004
Language
English
Publication Type
Article
Keywords
Animals
Automation
Bacterial Typing Techniques
Electrophoresis, Gel, Pulsed-Field
Finland - epidemiology
Food Microbiology
Humans
Listeria monocytogenes - classification - genetics - isolation & purification
Listeriosis - microbiology
Ribotyping
Serotyping
Abstract
Automated ribotyping, pulsed-field gel electrophoresis (PFGE) and serotyping were evaluated for the epidemiological study of isolates of Listeria monocytogenes collected in Finland in 1997-1999 from human blood (n = 116) and the food industry (n = 72). The isolates divided into six serotypes, 23 EcoRI ribotypes, 54 AscI PFGE types, and 57 final subtypes if all results were combined. The discrimination index of ribotyping was lower (0.873) than that of PFGE (0.946). Two final subtypes dominated among human isolates, and identical subtypes were also found among food industry isolates. All PFGE types were serotype-specific, whereas two ribotypes included isolates of two serotypes. Isolates of serotype 3a, involved in an outbreak in Finland in 1999, matched one of these ribotypes, which also included some food industry isolates of serotype 1/2a. Ribotyping with EcoRI would not have been sufficient to define the outbreak in Finland caused by serotype 3a isolates. Although ribotyping is applicable as the first method in outbreak situations, human and food isolates with identical ribotypes should be investigated further by PFGE.
PubMed ID
15191386 View in PubMed
Less detail

Molecular epidemiology of an outbreak of febrile gastroenteritis caused by Listeria monocytogenes in cold-smoked rainbow trout.

https://arctichealth.org/en/permalink/ahliterature201835
Source
J Clin Microbiol. 1999 Jul;37(7):2358-60
Publication Type
Article
Date
Jul-1999
Author
M K Miettinen
A. Siitonen
P. Heiskanen
H. Haajanen
K J Björkroth
H J Korkeala
Author Affiliation
Department of Food and Environmental Hygiene, 00014 University of Helsinki, Finland. msjoman@vetmed.helsinki.fi
Source
J Clin Microbiol. 1999 Jul;37(7):2358-60
Date
Jul-1999
Language
English
Publication Type
Article
Keywords
Adult
Animals
Child, Preschool
Disease Outbreaks
Electrophoresis, Gel, Pulsed-Field
Female
Fever
Finland - epidemiology
Food Handling
Food Microbiology
Gastroenteritis - epidemiology - microbiology
Humans
Listeria monocytogenes - classification - genetics - isolation & purification
Listeriosis - epidemiology - microbiology - transmission
Male
Middle Aged
Molecular Epidemiology - methods
Oncorhynchus mykiss - microbiology
Serotyping
Abstract
Febrile gastroenteritis in five healthy persons was associated with the consumption of vacuum-packed cold-smoked rainbow trout containing Listeria monocytogenes. L. monocytogenes isolates from the incriminated fish product lot and the stool samples were all of serotype 1/2a and were indistinguishable by pulsed-field gel electrophoresis employing AscI and SmaI.
Notes
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PubMed ID
10364616 View in PubMed
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Outbreak of hospital-acquired gastroenteritis and invasive infection caused by Listeria monocytogenes, Finland, 2012.

https://arctichealth.org/en/permalink/ahliterature283336
Source
Epidemiol Infect. 2016 Oct;144(13):2732-42
Publication Type
Article
Date
Oct-2016
Author
A. Jacks
A. Pihlajasaari
M. Vahe
A. Myntti
S-S Kaukoranta
N. Elomaa
S. Salmenlinna
L. Rantala
K. Lahti
S. Huusko
M. Kuusi
A. Siitonen
R. Rimhanen-Finne
Source
Epidemiol Infect. 2016 Oct;144(13):2732-42
Date
Oct-2016
Language
English
Publication Type
Article
Keywords
Aged
Aged, 80 and over
Animals
Cross Infection - microbiology
Female
Finland
Food Microbiology
Foodborne Diseases - microbiology
Gastroenteritis - microbiology
Gelatin - analysis
Humans
Listeria monocytogenes - isolation & purification
Listeriosis - microbiology
Male
Meat Products - microbiology
Middle Aged
Abstract
During one week in July 2012, two patients from the same ward at the municipal hospital in Vaasa, Finland, were diagnosed with septicaemia caused by Listeria monocytogenes. An outbreak investigation revealed eight concomitant cases of febrile gastroenteritis caused by L. monocytogenes on the same ward. Median age of the cases was 82 years and median incubation time for listerial gastroenteritis was 21 h (range 9-107). An additional 10 cases of invasive listeriosis caused by the same outbreak strain were identified across the whole country during the summer of 2012. Environmental investigation at the affected municipal hospital ward revealed ready-sliced meat jelly as the suspected source of the infection. During inspection of the meat jelly production plant, one pooled sample taken from a floor drain and a trolley wheel in the food processing environment was positive for the outbreak strain of L. monocytogenes. After the producer stopped the production of meat jelly, no further cases of listeriosis with the outbreak strain were identified via nationwide surveillance.
PubMed ID
26493730 View in PubMed
Less detail

Surveillance of listeriosis in Finland during 1995-2004.

https://arctichealth.org/en/permalink/ahliterature168646
Source
Euro Surveill. 2006;11(6):82-5
Publication Type
Article
Date
2006
Author
O. Lyytikäinen
U M Nakari
S. Lukinmaa
E. Kela
N. Nguyen Tran Minh
A. Siitonen
Author Affiliation
Department of Infectious Disease Epidemiology, National Public Health Institute (KTL), Helsinki, Finland.
Source
Euro Surveill. 2006;11(6):82-5
Date
2006
Language
English
Publication Type
Article
Keywords
Age Distribution
Aged
Cluster analysis
Disease Outbreaks
Female
Finland - epidemiology
Fish Products - microbiology
Genotype
Humans
Incidence
Infant, Newborn
Listeria monocytogenes - classification - genetics - isolation & purification
Listeriosis - epidemiology - microbiology - mortality
Population Surveillance
Pregnancy
Registries
Serotyping
Abstract
We analysed the surveillance data from listeriosis cases notified to the Finnish National Infectious Diseases Register between 1995 and 2004 and describe our recent experience in investigating clusters of listeriosis cases. The number of annual cases varied between 18 and 53 but no trends in incidence were identified (average annual incidence was 7 cases per million inhabitants). Only a few cases affected pregnant women or newborns. Most of the patients were elderly people with non-malignant underlying illnesses; 25% of them died from their infections. By routine sero- and genotyping of the listeria isolates, we detected several clusters; the vehicle for infection was only identified for two outbreaks. At least one quarter of listeriosis cases (78/315) was caused by a certain sero-genotype or closely related genotypes, which have also been found from vacuum-packed cold-smoked or cold-salted fish products. During 2000-2003, Finnish consumers were repeatedly informed about food precautions for risk groups. The information was also given to attending physicians and prenatal clinics.
PubMed ID
16801696 View in PubMed
Less detail