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1.
Euro Surveill ; 23(35)2018 08.
Article in English | MEDLINE | ID: mdl-30180926

ABSTRACT

In August 2016, an outbreak of Shiga toxin-producing Escherichia coli (STEC) and enteropathogenic E. coli (EPEC) with 237 cases occurred in the Helsinki metropolitan area, Finland. Gastroenteritis cases were reported at 11 events served by one catering company. Microbiological and epidemiological investigations suggested rocket salad as the cause of the outbreak. STEC ONT: H11 and EPEC O111:H8 strains isolated from food samples containing rocket were identical to the patient isolates. In this outbreak, the reported symptoms were milder than considered before for STEC infection, and the guidelines for STEC control measures need to be updated based on the severity of the illness. Based on our experience in this outbreak, national surveillance criteria for STEC have been updated to meet the practice in reporting laboratories covering both PCR-positive and culture-confirmed findings. We suggest that EPEC could be added to the national surveillance since diagnostics for EPEC are routinely done in clinical laboratories.


Subject(s)
Disease Outbreaks/statistics & numerical data , Enteropathogenic Escherichia coli/isolation & purification , Escherichia coli Infections/epidemiology , Shiga-Toxigenic Escherichia coli/isolation & purification , Vegetables/microbiology , Adhesins, Bacterial/genetics , Adhesins, Bacterial/metabolism , Enteropathogenic Escherichia coli/classification , Enteropathogenic Escherichia coli/genetics , Escherichia coli Infections/microbiology , Escherichia coli Proteins/genetics , Feces/microbiology , Finland/epidemiology , Foodborne Diseases/epidemiology , Humans , Polymerase Chain Reaction/methods , Shiga Toxin/metabolism , Shiga-Toxigenic Escherichia coli/classification , Shiga-Toxigenic Escherichia coli/genetics
2.
Duodecim ; 132(2): 165-71, 2016.
Article in Finnish | MEDLINE | ID: mdl-26939490

ABSTRACT

BACKGROUND: Recurrent cases of gastroenteritis occurred in a small hotel. The causative agent of disease could not be detected. MATERIAL AND METHODS: The cause and the source of the disease were established through epidemiological investigations and laboratory diagnosis. RESULTS: The causative agent of the disease was norovirus GI.3. Norovirus GI was detected in the water from the well and on surfaces at the hotel. CONCLUSIONS: Both epidemiological investigations and laboratory diagnostics are needed in resolving epidemics. Continuous development of laboratory methods is important.


Subject(s)
Caliciviridae Infections/epidemiology , Caliciviridae Infections/virology , Disease Outbreaks , Gastroenteritis/epidemiology , Gastroenteritis/virology , Housing , Norovirus/isolation & purification , Water Microbiology , Humans , Recurrence
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