Hepatitis A outbreak linked to imported frozen strawberries by sequencing, Sweden and Austria, June to September 2018

Author:

Enkirch Theresa12,Eriksson Ronnie3,Persson Sofia3,Schmid Daniela4,Aberle Stephan W.5,Löf Emma62,Wittesjö Bengt7,Holmgren Birgitta8,Johnzon Charlotte9,Gustafsson Eva X.8,Svensson Lena M.10,Sandelin Lisa Labbé11,Richter Lukas4,Lindblad Mats3,Brytting Mia2,Maritschnik Sabine4,Tallo Tatjana2,Malm Therese12,Sundqvist Lena2,Ederth Josefine Lundberg2

Affiliation:

1. European Programme for Public Health Microbiology Training (EUPHEM), European Centre for Disease Prevention and Control (ECDC), Stockholm, Sweden

2. Public Health Agency of Sweden, Solna, Sweden

3. National Food Agency, Uppsala, Sweden

4. Austrian Agency for Health and Food Safety, Vienna, Austria

5. Center for Virology, Medical University of Vienna, Vienna, Austria

6. European Programme for Intervention Epidemiology Training (EPIET), European Centre for Disease Prevention and Control, (ECDC), Stockholm, Sweden

7. Department of Communicable Disease Control and Prevention, Blekinge County, Sweden

8. Department of Communicable Disease Control and Prevention, Skåne County, Sweden

9. The Environment and Health Administration of Stockholm Municipality, Stockholm, Sweden

10. Department of Communicable Disease Control and Prevention, Östergötland County, Sweden

11. Department of Communicable Disease Control and Prevention, Kalmar County, Sweden

12. Department of Communicable Disease Control and Prevention, Gävleborg County, Sweden

Abstract

Between June–September 2018, 20 hepatitis A cases were notified in six counties in Sweden. Combined epidemiological and microbiological investigations identified imported frozen strawberries produced in Poland as the source of the outbreak. Sequence analysis confirmed the outbreak strain IB in the strawberries with 100 % identity and the respective batch was withdrawn. Sharing the sequence information internationally led to the identification of 14 additional cases in Austria, linked to strawberries from the same producer.

Publisher

European Centre for Disease Control and Prevention (ECDC)

Subject

Virology,Public Health, Environmental and Occupational Health,Epidemiology

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